A:
Positive:
1 x 125215517 x 178879319 x 65902931 x 403921133 x 94147217 x 57703589 x 212593037 x 4123
Negative:
-1 x -12521551-7 x -1788793-19 x -659029-31 x -403921-133 x -94147-217 x -57703-589 x -21259-3037 x -4123
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 12,521,551, 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 | 12,521,551 | |
| -1 | -12,521,551 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,521,551.
Example:
1 x 12,521,551 = 12,521,551
and
-1 x -12,521,551 = 12,521,551
Notice both answers equal 12,521,551
With that explanation out of the way, let's continue. Next, we take the number 12,521,551 and divide it by 2:
12,521,551 ÷ 2 = 6,260,775.5
If the quotient is a whole number, then 2 and 6,260,775.5 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 | 12,521,551 | |
| -1 | -12,521,551 |
Now, we try dividing 12,521,551 by 3:
12,521,551 ÷ 3 = 4,173,850.3333
If the quotient is a whole number, then 3 and 4,173,850.3333 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 | 12,521,551 | |
| -1 | -12,521,551 |
Let's try dividing by 4:
12,521,551 ÷ 4 = 3,130,387.75
If the quotient is a whole number, then 4 and 3,130,387.75 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 | 12,521,551 | |
| -1 | 12,521,551 |
If you did it right, you will end up with this table:
| 1 | 7 | 19 | 31 | 133 | 217 | 589 | 3,037 | 4,123 | 21,259 | 57,703 | 94,147 | 403,921 | 659,029 | 1,788,793 | 12,521,551 |
| -1 | -7 | -19 | -31 | -133 | -217 | -589 | -3,037 | -4,123 | -21,259 | -57,703 | -94,147 | -403,921 | -659,029 | -1,788,793 | -12,521,551 |
Here are some more numbers to try:
Try the factor calculator