Q: What are the factor combinations of the number 316,908?

 A:
Positive:   1 x 3169082 x 1584543 x 1056364 x 792276 x 528189 x 3521212 x 2640918 x 1760636 x 8803
Negative: -1 x -316908-2 x -158454-3 x -105636-4 x -79227-6 x -52818-9 x -35212-12 x -26409-18 x -17606-36 x -8803


How do I find the factor combinations of the number 316,908?

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 316,908, 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.

1 316,908
-1 -316,908

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 316,908.

Example:
1 x 316,908 = 316,908
and
-1 x -316,908 = 316,908
Notice both answers equal 316,908

With that explanation out of the way, let's continue. Next, we take the number 316,908 and divide it by 2:

316,908 ÷ 2 = 158,454

If the quotient is a whole number, then 2 and 158,454 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 2 158,454 316,908
-1 -2 -158,454 -316,908

Now, we try dividing 316,908 by 3:

316,908 ÷ 3 = 105,636

If the quotient is a whole number, then 3 and 105,636 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 3 105,636 158,454 316,908
-1 -2 -3 -105,636 -158,454 -316,908

Let's try dividing by 4:

316,908 ÷ 4 = 79,227

If the quotient is a whole number, then 4 and 79,227 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 79,227 105,636 158,454 316,908
-1 -2 -3 -4 -79,227 -105,636 -158,454 316,908
Keep dividing by the next highest number until you cannot divide anymore.

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

1234691218368,80317,60626,40935,21252,81879,227105,636158,454316,908
-1-2-3-4-6-9-12-18-36-8,803-17,606-26,409-35,212-52,818-79,227-105,636-158,454-316,908

More Examples

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