Q: What are the factor combinations of the number 210,693,690?

 A:
Positive:   1 x 2106936902 x 1053468453 x 702312305 x 421387386 x 351156159 x 2341041010 x 2106936915 x 1404624618 x 1170520527 x 780347030 x 702312345 x 468208254 x 390173590 x 2341041135 x 1560694270 x 780347
Negative: -1 x -210693690-2 x -105346845-3 x -70231230-5 x -42138738-6 x -35115615-9 x -23410410-10 x -21069369-15 x -14046246-18 x -11705205-27 x -7803470-30 x -7023123-45 x -4682082-54 x -3901735-90 x -2341041-135 x -1560694-270 x -780347


How do I find the factor combinations of the number 210,693,690?

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 210,693,690, 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.

1 210,693,690
-1 -210,693,690

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 210,693,690.

Example:
1 x 210,693,690 = 210,693,690
and
-1 x -210,693,690 = 210,693,690
Notice both answers equal 210,693,690

With that explanation out of the way, let's continue. Next, we take the number 210,693,690 and divide it by 2:

210,693,690 ÷ 2 = 105,346,845

If the quotient is a whole number, then 2 and 105,346,845 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 2 105,346,845 210,693,690
-1 -2 -105,346,845 -210,693,690

Now, we try dividing 210,693,690 by 3:

210,693,690 ÷ 3 = 70,231,230

If the quotient is a whole number, then 3 and 70,231,230 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 3 70,231,230 105,346,845 210,693,690
-1 -2 -3 -70,231,230 -105,346,845 -210,693,690

Let's try dividing by 4:

210,693,690 ÷ 4 = 52,673,422.5

If the quotient is a whole number, then 4 and 52,673,422.5 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 3 70,231,230 105,346,845 210,693,690
-1 -2 -3 -70,231,230 -105,346,845 210,693,690
Keep dividing by the next highest number until you cannot divide anymore.

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

1235691015182730455490135270780,3471,560,6942,341,0413,901,7354,682,0827,023,1237,803,47011,705,20514,046,24621,069,36923,410,41035,115,61542,138,73870,231,230105,346,845210,693,690
-1-2-3-5-6-9-10-15-18-27-30-45-54-90-135-270-780,347-1,560,694-2,341,041-3,901,735-4,682,082-7,023,123-7,803,470-11,705,205-14,046,246-21,069,369-23,410,410-35,115,615-42,138,738-70,231,230-105,346,845-210,693,690

More Examples

Here are some more numbers to try:

210,693,688210,693,689210,693,691210,693,692
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