Q: What are the factor combinations of the number 67,557,771?

 A:
Positive:   1 x 675577713 x 225192579 x 7506419
Negative: -1 x -67557771-3 x -22519257-9 x -7506419


How do I find the factor combinations of the number 67,557,771?

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 67,557,771, 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 67,557,771
-1 -67,557,771

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 67,557,771.

Example:
1 x 67,557,771 = 67,557,771
and
-1 x -67,557,771 = 67,557,771
Notice both answers equal 67,557,771

With that explanation out of the way, let's continue. Next, we take the number 67,557,771 and divide it by 2:

67,557,771 ÷ 2 = 33,778,885.5

If the quotient is a whole number, then 2 and 33,778,885.5 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 67,557,771
-1 -67,557,771

Now, we try dividing 67,557,771 by 3:

67,557,771 ÷ 3 = 22,519,257

If the quotient is a whole number, then 3 and 22,519,257 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 22,519,257 67,557,771
-1 -3 -22,519,257 -67,557,771

Let's try dividing by 4:

67,557,771 ÷ 4 = 16,889,442.75

If the quotient is a whole number, then 4 and 16,889,442.75 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 22,519,257 67,557,771
-1 -3 -22,519,257 67,557,771
Keep dividing by the next highest number until you cannot divide anymore.

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

1397,506,41922,519,25767,557,771
-1-3-9-7,506,419-22,519,257-67,557,771

More Examples

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