Q: What are the factor combinations of the number 313,123,297?

 A:
Positive:   1 x 313123297991 x 315967
Negative: -1 x -313123297-991 x -315967


How do I find the factor combinations of the number 313,123,297?

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 313,123,297, 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.

1 313,123,297
-1 -313,123,297

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 313,123,297.

Example:
1 x 313,123,297 = 313,123,297
and
-1 x -313,123,297 = 313,123,297
Notice both answers equal 313,123,297

With that explanation out of the way, let's continue. Next, we take the number 313,123,297 and divide it by 2:

313,123,297 ÷ 2 = 156,561,648.5

If the quotient is a whole number, then 2 and 156,561,648.5 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:

1 313,123,297
-1 -313,123,297

Now, we try dividing 313,123,297 by 3:

313,123,297 ÷ 3 = 104,374,432.3333

If the quotient is a whole number, then 3 and 104,374,432.3333 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:

1 313,123,297
-1 -313,123,297

Let's try dividing by 4:

313,123,297 ÷ 4 = 78,280,824.25

If the quotient is a whole number, then 4 and 78,280,824.25 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:

1 313,123,297
-1 313,123,297
Keep dividing by the next highest number until you cannot divide anymore.

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

1991315,967313,123,297
-1-991-315,967-313,123,297

More Examples

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