Q: What are the factor combinations of the number 215,606,437?

 A:
Positive:   1 x 21560643737 x 582720147 x 45873711739 x 123983
Negative: -1 x -215606437-37 x -5827201-47 x -4587371-1739 x -123983


How do I find the factor combinations of the number 215,606,437?

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 215,606,437, 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.

1 215,606,437
-1 -215,606,437

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 215,606,437.

Example:
1 x 215,606,437 = 215,606,437
and
-1 x -215,606,437 = 215,606,437
Notice both answers equal 215,606,437

With that explanation out of the way, let's continue. Next, we take the number 215,606,437 and divide it by 2:

215,606,437 ÷ 2 = 107,803,218.5

If the quotient is a whole number, then 2 and 107,803,218.5 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:

1 215,606,437
-1 -215,606,437

Now, we try dividing 215,606,437 by 3:

215,606,437 ÷ 3 = 71,868,812.3333

If the quotient is a whole number, then 3 and 71,868,812.3333 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:

1 215,606,437
-1 -215,606,437

Let's try dividing by 4:

215,606,437 ÷ 4 = 53,901,609.25

If the quotient is a whole number, then 4 and 53,901,609.25 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:

1 215,606,437
-1 215,606,437
Keep dividing by the next highest number until you cannot divide anymore.

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

137471,739123,9834,587,3715,827,201215,606,437
-1-37-47-1,739-123,983-4,587,371-5,827,201-215,606,437

More Examples

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