Q: What are the factor combinations of the number 45,131,322?

 A:
Positive:   1 x 451313222 x 225656613 x 150437746 x 7521887
Negative: -1 x -45131322-2 x -22565661-3 x -15043774-6 x -7521887


How do I find the factor combinations of the number 45,131,322?

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 45,131,322, 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 45,131,322
-1 -45,131,322

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 45,131,322.

Example:
1 x 45,131,322 = 45,131,322
and
-1 x -45,131,322 = 45,131,322
Notice both answers equal 45,131,322

With that explanation out of the way, let's continue. Next, we take the number 45,131,322 and divide it by 2:

45,131,322 ÷ 2 = 22,565,661

If the quotient is a whole number, then 2 and 22,565,661 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 22,565,661 45,131,322
-1 -2 -22,565,661 -45,131,322

Now, we try dividing 45,131,322 by 3:

45,131,322 ÷ 3 = 15,043,774

If the quotient is a whole number, then 3 and 15,043,774 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 15,043,774 22,565,661 45,131,322
-1 -2 -3 -15,043,774 -22,565,661 -45,131,322

Let's try dividing by 4:

45,131,322 ÷ 4 = 11,282,830.5

If the quotient is a whole number, then 4 and 11,282,830.5 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 3 15,043,774 22,565,661 45,131,322
-1 -2 -3 -15,043,774 -22,565,661 45,131,322
Keep dividing by the next highest number until you cannot divide anymore.

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

12367,521,88715,043,77422,565,66145,131,322
-1-2-3-6-7,521,887-15,043,774-22,565,661-45,131,322

More Examples

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