Q: What are the factor combinations of the number 8,689,879?

 A:
Positive:   1 x 868987911 x 78998929 x 299651319 x 27241
Negative: -1 x -8689879-11 x -789989-29 x -299651-319 x -27241


How do I find the factor combinations of the number 8,689,879?

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 8,689,879, 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 8,689,879
-1 -8,689,879

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 8,689,879.

Example:
1 x 8,689,879 = 8,689,879
and
-1 x -8,689,879 = 8,689,879
Notice both answers equal 8,689,879

With that explanation out of the way, let's continue. Next, we take the number 8,689,879 and divide it by 2:

8,689,879 ÷ 2 = 4,344,939.5

If the quotient is a whole number, then 2 and 4,344,939.5 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 8,689,879
-1 -8,689,879

Now, we try dividing 8,689,879 by 3:

8,689,879 ÷ 3 = 2,896,626.3333

If the quotient is a whole number, then 3 and 2,896,626.3333 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 8,689,879
-1 -8,689,879

Let's try dividing by 4:

8,689,879 ÷ 4 = 2,172,469.75

If the quotient is a whole number, then 4 and 2,172,469.75 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 8,689,879
-1 8,689,879
Keep dividing by the next highest number until you cannot divide anymore.

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

1112931927,241299,651789,9898,689,879
-1-11-29-319-27,241-299,651-789,989-8,689,879

More Examples

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