Q: What are the factor combinations of the number 421,135,540?

 A:
Positive:   1 x 4211355402 x 2105677704 x 1052838855 x 842271087 x 6016222010 x 4211355414 x 3008111020 x 2105677728 x 1504055535 x 1203244470 x 601622273 x 576898089 x 4731860140 x 3008111146 x 2884490178 x 2365930292 x 1442245356 x 1182965365 x 1153796445 x 946372463 x 909580511 x 824140623 x 675980730 x 576898890 x 473186926 x 4547901022 x 4120701246 x 3379901460 x 2884491780 x 2365931852 x 2273952044 x 2060352315 x 1819162492 x 1689952555 x 1648283115 x 1351963241 x 1299404630 x 909585110 x 824146230 x 675986482 x 649706497 x 648209260 x 4547910220 x 4120712460 x 3379912964 x 3248512994 x 3241016205 x 25988
Negative: -1 x -421135540-2 x -210567770-4 x -105283885-5 x -84227108-7 x -60162220-10 x -42113554-14 x -30081110-20 x -21056777-28 x -15040555-35 x -12032444-70 x -6016222-73 x -5768980-89 x -4731860-140 x -3008111-146 x -2884490-178 x -2365930-292 x -1442245-356 x -1182965-365 x -1153796-445 x -946372-463 x -909580-511 x -824140-623 x -675980-730 x -576898-890 x -473186-926 x -454790-1022 x -412070-1246 x -337990-1460 x -288449-1780 x -236593-1852 x -227395-2044 x -206035-2315 x -181916-2492 x -168995-2555 x -164828-3115 x -135196-3241 x -129940-4630 x -90958-5110 x -82414-6230 x -67598-6482 x -64970-6497 x -64820-9260 x -45479-10220 x -41207-12460 x -33799-12964 x -32485-12994 x -32410-16205 x -25988


How do I find the factor combinations of the number 421,135,540?

Unfortunately, there's not simple formula to identifying all of the factors of a number and it can be a tedious process when trying to identify the divisors of larger numbers. To find the factor combinations of the number 421,135,540, it is easier to work with a table - it's called factoring from the outside in.

Outside in Factoring

We start by creating a table and writing 1 on the left side and then the number we're trying to find the factors for on the right side in a table. Then, below that, write the numbers as a negative as well.

1 421,135,540
-1 -421,135,540

Why are the negative numbers included?

When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 421,135,540.

Example:
1 x 421,135,540 = 421,135,540
and
-1 x -421,135,540 = 421,135,540
Notice both answers equal 421,135,540

With that explanation out of the way, let's continue. Next, we take the number 421,135,540 and divide it by 2:

421,135,540 ÷ 2 = 210,567,770

If the quotient is a whole number, then 2 and 210,567,770 are factors. In this case, the quotient is a whole number. Write them in the table inside the other two factors like the below example. Don't forget to write the negative numbers too!

Here is what our table should look like at this step:

1 2 210,567,770 421,135,540
-1 -2 -210,567,770 -421,135,540

Now, we try dividing 421,135,540 by 3:

421,135,540 ÷ 3 = 140,378,513.3333

If the quotient is a whole number, then 3 and 140,378,513.3333 are factors. In this case, the quotient is not a whole number. Don't write anything down and try the next divisor.

Here is what our table should look like at this step:

1 2 210,567,770 421,135,540
-1 -2 -210,567,770 -421,135,540

Let's try dividing by 4:

421,135,540 ÷ 4 = 105,283,885

If the quotient is a whole number, then 4 and 105,283,885 are factors. In this case, the quotient is a whole number. Write them in the table inside the other two factors like the below example. Don't forget to write the negative numbers too!

Here is what our table should look like at this step:

1 2 4 105,283,885 210,567,770 421,135,540
-1 -2 -4 -105,283,885 -210,567,770 421,135,540
Keep dividing by the next highest number until you cannot divide anymore.

If you did it right, you will end up with this table:

1245710142028357073891401461782923563654454635116237308909261,0221,2461,4601,7801,8522,0442,3152,4922,5553,1153,2414,6305,1106,2306,4826,4979,26010,22012,46012,96412,99416,20525,98832,41032,48533,79941,20745,47964,82064,97067,59882,41490,958129,940135,196164,828168,995181,916206,035227,395236,593288,449337,990412,070454,790473,186576,898675,980824,140909,580946,3721,153,7961,182,9651,442,2452,365,9302,884,4903,008,1114,731,8605,768,9806,016,22212,032,44415,040,55521,056,77730,081,11042,113,55460,162,22084,227,108105,283,885210,567,770421,135,540
-1-2-4-5-7-10-14-20-28-35-70-73-89-140-146-178-292-356-365-445-463-511-623-730-890-926-1,022-1,246-1,460-1,780-1,852-2,044-2,315-2,492-2,555-3,115-3,241-4,630-5,110-6,230-6,482-6,497-9,260-10,220-12,460-12,964-12,994-16,205-25,988-32,410-32,485-33,799-41,207-45,479-64,820-64,970-67,598-82,414-90,958-129,940-135,196-164,828-168,995-181,916-206,035-227,395-236,593-288,449-337,990-412,070-454,790-473,186-576,898-675,980-824,140-909,580-946,372-1,153,796-1,182,965-1,442,245-2,365,930-2,884,490-3,008,111-4,731,860-5,768,980-6,016,222-12,032,444-15,040,555-21,056,777-30,081,110-42,113,554-60,162,220-84,227,108-105,283,885-210,567,770-421,135,540

More Examples

Here are some more numbers to try:

421,135,538421,135,539421,135,541421,135,542
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