Q: What are the factor combinations of the number 12,580,754?

 A:
Positive:   1 x 125807542 x 6290377
Negative: -1 x -12580754-2 x -6290377


How do I find the factor combinations of the number 12,580,754?

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 12,580,754, 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 12,580,754
-1 -12,580,754

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 12,580,754.

Example:
1 x 12,580,754 = 12,580,754
and
-1 x -12,580,754 = 12,580,754
Notice both answers equal 12,580,754

With that explanation out of the way, let's continue. Next, we take the number 12,580,754 and divide it by 2:

12,580,754 ÷ 2 = 6,290,377

If the quotient is a whole number, then 2 and 6,290,377 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 6,290,377 12,580,754
-1 -2 -6,290,377 -12,580,754

Now, we try dividing 12,580,754 by 3:

12,580,754 ÷ 3 = 4,193,584.6667

If the quotient is a whole number, then 3 and 4,193,584.6667 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 2 6,290,377 12,580,754
-1 -2 -6,290,377 -12,580,754

Let's try dividing by 4:

12,580,754 ÷ 4 = 3,145,188.5

If the quotient is a whole number, then 4 and 3,145,188.5 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 6,290,377 12,580,754
-1 -2 -6,290,377 12,580,754
Keep dividing by the next highest number until you cannot divide anymore.

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

126,290,37712,580,754
-1-2-6,290,377-12,580,754

More Examples

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