Q: What are the factor combinations of the number 121,546,625?

 A:
Positive:   1 x 1215466255 x 2430932525 x 4861865125 x 972373
Negative: -1 x -121546625-5 x -24309325-25 x -4861865-125 x -972373


How do I find the factor combinations of the number 121,546,625?

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 121,546,625, 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.

1 121,546,625
-1 -121,546,625

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 121,546,625.

Example:
1 x 121,546,625 = 121,546,625
and
-1 x -121,546,625 = 121,546,625
Notice both answers equal 121,546,625

With that explanation out of the way, let's continue. Next, we take the number 121,546,625 and divide it by 2:

121,546,625 ÷ 2 = 60,773,312.5

If the quotient is a whole number, then 2 and 60,773,312.5 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:

1 121,546,625
-1 -121,546,625

Now, we try dividing 121,546,625 by 3:

121,546,625 ÷ 3 = 40,515,541.6667

If the quotient is a whole number, then 3 and 40,515,541.6667 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:

1 121,546,625
-1 -121,546,625

Let's try dividing by 4:

121,546,625 ÷ 4 = 30,386,656.25

If the quotient is a whole number, then 4 and 30,386,656.25 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:

1 121,546,625
-1 121,546,625
Keep dividing by the next highest number until you cannot divide anymore.

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

1525125972,3734,861,86524,309,325121,546,625
-1-5-25-125-972,373-4,861,865-24,309,325-121,546,625

More Examples

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