Q: What are the factor combinations of the number 56,663,871?

 A:
Positive:   1 x 566638713 x 1888795711 x 515126119 x 298230933 x 171708757 x 994103209 x 271119627 x 90373
Negative: -1 x -56663871-3 x -18887957-11 x -5151261-19 x -2982309-33 x -1717087-57 x -994103-209 x -271119-627 x -90373


How do I find the factor combinations of the number 56,663,871?

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 56,663,871, 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 56,663,871
-1 -56,663,871

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 56,663,871.

Example:
1 x 56,663,871 = 56,663,871
and
-1 x -56,663,871 = 56,663,871
Notice both answers equal 56,663,871

With that explanation out of the way, let's continue. Next, we take the number 56,663,871 and divide it by 2:

56,663,871 ÷ 2 = 28,331,935.5

If the quotient is a whole number, then 2 and 28,331,935.5 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 56,663,871
-1 -56,663,871

Now, we try dividing 56,663,871 by 3:

56,663,871 ÷ 3 = 18,887,957

If the quotient is a whole number, then 3 and 18,887,957 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 3 18,887,957 56,663,871
-1 -3 -18,887,957 -56,663,871

Let's try dividing by 4:

56,663,871 ÷ 4 = 14,165,967.75

If the quotient is a whole number, then 4 and 14,165,967.75 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 3 18,887,957 56,663,871
-1 -3 -18,887,957 56,663,871
Keep dividing by the next highest number until you cannot divide anymore.

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

131119335720962790,373271,119994,1031,717,0872,982,3095,151,26118,887,95756,663,871
-1-3-11-19-33-57-209-627-90,373-271,119-994,103-1,717,087-2,982,309-5,151,261-18,887,957-56,663,871

More Examples

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