Q: What are the factor combinations of the number 215,736?

 A:
Positive:   1 x 2157362 x 1078683 x 719124 x 539346 x 359568 x 2696712 x 1797824 x 898989 x 2424101 x 2136178 x 1212202 x 1068267 x 808303 x 712356 x 606404 x 534
Negative: -1 x -215736-2 x -107868-3 x -71912-4 x -53934-6 x -35956-8 x -26967-12 x -17978-24 x -8989-89 x -2424-101 x -2136-178 x -1212-202 x -1068-267 x -808-303 x -712-356 x -606-404 x -534


How do I find the factor combinations of the number 215,736?

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 215,736, 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.

1 215,736
-1 -215,736

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 215,736.

Example:
1 x 215,736 = 215,736
and
-1 x -215,736 = 215,736
Notice both answers equal 215,736

With that explanation out of the way, let's continue. Next, we take the number 215,736 and divide it by 2:

215,736 ÷ 2 = 107,868

If the quotient is a whole number, then 2 and 107,868 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 2 107,868 215,736
-1 -2 -107,868 -215,736

Now, we try dividing 215,736 by 3:

215,736 ÷ 3 = 71,912

If the quotient is a whole number, then 3 and 71,912 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 71,912 107,868 215,736
-1 -2 -3 -71,912 -107,868 -215,736

Let's try dividing by 4:

215,736 ÷ 4 = 53,934

If the quotient is a whole number, then 4 and 53,934 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 4 53,934 71,912 107,868 215,736
-1 -2 -3 -4 -53,934 -71,912 -107,868 215,736
Keep dividing by the next highest number until you cannot divide anymore.

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

1234681224891011782022673033564045346067128081,0681,2122,1362,4248,98917,97826,96735,95653,93471,912107,868215,736
-1-2-3-4-6-8-12-24-89-101-178-202-267-303-356-404-534-606-712-808-1,068-1,212-2,136-2,424-8,989-17,978-26,967-35,956-53,934-71,912-107,868-215,736

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