Q: What are the factor combinations of the number 108,485?

 A:
Positive:   1 x 1084855 x 2169713 x 834565 x 1669
Negative: -1 x -108485-5 x -21697-13 x -8345-65 x -1669


How do I find the factor combinations of the number 108,485?

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 108,485, 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.

1 108,485
-1 -108,485

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 108,485.

Example:
1 x 108,485 = 108,485
and
-1 x -108,485 = 108,485
Notice both answers equal 108,485

With that explanation out of the way, let's continue. Next, we take the number 108,485 and divide it by 2:

108,485 ÷ 2 = 54,242.5

If the quotient is a whole number, then 2 and 54,242.5 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:

1 108,485
-1 -108,485

Now, we try dividing 108,485 by 3:

108,485 ÷ 3 = 36,161.6667

If the quotient is a whole number, then 3 and 36,161.6667 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:

1 108,485
-1 -108,485

Let's try dividing by 4:

108,485 ÷ 4 = 27,121.25

If the quotient is a whole number, then 4 and 27,121.25 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:

1 108,485
-1 108,485
Keep dividing by the next highest number until you cannot divide anymore.

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

1513651,6698,34521,697108,485
-1-5-13-65-1,669-8,345-21,697-108,485

More Examples

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