Q: What are the factor combinations of the number 991,691?
A:
Positive:
1 x 99169123 x 43117
Negative:
-1 x -991691-23 x -43117
A:
Positive:
1 x 99169123 x 43117
Negative:
-1 x -991691-23 x -43117
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 991,691, it is easier to work with a table - it's called factoring from the outside in.
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 | 991,691 | |
-1 | -991,691 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 991,691.
Example:
1 x 991,691 = 991,691
and
-1 x -991,691 = 991,691
Notice both answers equal 991,691
With that explanation out of the way, let's continue. Next, we take the number 991,691 and divide it by 2:
991,691 ÷ 2 = 495,845.5
If the quotient is a whole number, then 2 and 495,845.5 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 | 991,691 | |
-1 | -991,691 |
Now, we try dividing 991,691 by 3:
991,691 ÷ 3 = 330,563.6667
If the quotient is a whole number, then 3 and 330,563.6667 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 | 991,691 | |
-1 | -991,691 |
Let's try dividing by 4:
991,691 ÷ 4 = 247,922.75
If the quotient is a whole number, then 4 and 247,922.75 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 | 991,691 | |
-1 | 991,691 |
If you did it right, you will end up with this table:
1 | 23 | 43,117 | 991,691 |
-1 | -23 | -43,117 | -991,691 |
Here are some more numbers to try:
Try the factor calculator