Q: What are the factor combinations of the number 11,983,540?

 A:
Positive:   1 x 119835402 x 59917704 x 29958855 x 239670810 x 119835420 x 59917783 x 144380166 x 72190332 x 36095415 x 28876830 x 144381660 x 7219
Negative: -1 x -11983540-2 x -5991770-4 x -2995885-5 x -2396708-10 x -1198354-20 x -599177-83 x -144380-166 x -72190-332 x -36095-415 x -28876-830 x -14438-1660 x -7219


How do I find the factor combinations of the number 11,983,540?

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 11,983,540, 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 11,983,540
-1 -11,983,540

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 11,983,540.

Example:
1 x 11,983,540 = 11,983,540
and
-1 x -11,983,540 = 11,983,540
Notice both answers equal 11,983,540

With that explanation out of the way, let's continue. Next, we take the number 11,983,540 and divide it by 2:

11,983,540 ÷ 2 = 5,991,770

If the quotient is a whole number, then 2 and 5,991,770 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 5,991,770 11,983,540
-1 -2 -5,991,770 -11,983,540

Now, we try dividing 11,983,540 by 3:

11,983,540 ÷ 3 = 3,994,513.3333

If the quotient is a whole number, then 3 and 3,994,513.3333 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 5,991,770 11,983,540
-1 -2 -5,991,770 -11,983,540

Let's try dividing by 4:

11,983,540 ÷ 4 = 2,995,885

If the quotient is a whole number, then 4 and 2,995,885 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 2,995,885 5,991,770 11,983,540
-1 -2 -4 -2,995,885 -5,991,770 11,983,540
Keep dividing by the next highest number until you cannot divide anymore.

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

12451020831663324158301,6607,21914,43828,87636,09572,190144,380599,1771,198,3542,396,7082,995,8855,991,77011,983,540
-1-2-4-5-10-20-83-166-332-415-830-1,660-7,219-14,438-28,876-36,095-72,190-144,380-599,177-1,198,354-2,396,708-2,995,885-5,991,770-11,983,540

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