Q: What are the factor combinations of the number 39,088,174?

 A:
Positive:   1 x 390881742 x 19544087
Negative: -1 x -39088174-2 x -19544087


How do I find the factor combinations of the number 39,088,174?

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 39,088,174, 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 39,088,174
-1 -39,088,174

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 39,088,174.

Example:
1 x 39,088,174 = 39,088,174
and
-1 x -39,088,174 = 39,088,174
Notice both answers equal 39,088,174

With that explanation out of the way, let's continue. Next, we take the number 39,088,174 and divide it by 2:

39,088,174 ÷ 2 = 19,544,087

If the quotient is a whole number, then 2 and 19,544,087 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 19,544,087 39,088,174
-1 -2 -19,544,087 -39,088,174

Now, we try dividing 39,088,174 by 3:

39,088,174 ÷ 3 = 13,029,391.3333

If the quotient is a whole number, then 3 and 13,029,391.3333 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 2 19,544,087 39,088,174
-1 -2 -19,544,087 -39,088,174

Let's try dividing by 4:

39,088,174 ÷ 4 = 9,772,043.5

If the quotient is a whole number, then 4 and 9,772,043.5 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 2 19,544,087 39,088,174
-1 -2 -19,544,087 39,088,174
Keep dividing by the next highest number until you cannot divide anymore.

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

1219,544,08739,088,174
-1-2-19,544,087-39,088,174

More Examples

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