Q: What are the factor combinations of the number 971?

 A:
Positive:   1 x 971
Negative: -1 x -971


How do I find the factor combinations of the number 971?

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 971, 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.

1 971
-1 -971

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 971.

Example:
1 x 971 = 971
and
-1 x -971 = 971
Notice both answers equal 971

With that explanation out of the way, let's continue. Next, we take the number 971 and divide it by 2:

971 ÷ 2 = 485.5

If the quotient is a whole number, then 2 and 485.5 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:

1 971
-1 -971

Now, we try dividing 971 by 3:

971 ÷ 3 = 323.6667

If the quotient is a whole number, then 3 and 323.6667 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:

1 971
-1 -971

Let's try dividing by 4:

971 ÷ 4 = 242.75

If the quotient is a whole number, then 4 and 242.75 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:

1 971
-1 971
Keep dividing by the next highest number until you cannot divide anymore.

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

1971
-1-971

More Examples

Here are some more numbers to try:

Try the factor calculator

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