A:
Positive:
1 x 125135155 x 25027037 x 178764535 x 35752947 x 266245235 x 53249329 x 380351645 x 7607
Negative:
-1 x -12513515-5 x -2502703-7 x -1787645-35 x -357529-47 x -266245-235 x -53249-329 x -38035-1645 x -7607
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 12,513,515, 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 | 12,513,515 | |
| -1 | -12,513,515 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,513,515.
Example:
1 x 12,513,515 = 12,513,515
and
-1 x -12,513,515 = 12,513,515
Notice both answers equal 12,513,515
With that explanation out of the way, let's continue. Next, we take the number 12,513,515 and divide it by 2:
12,513,515 ÷ 2 = 6,256,757.5
If the quotient is a whole number, then 2 and 6,256,757.5 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 | 12,513,515 | |
| -1 | -12,513,515 |
Now, we try dividing 12,513,515 by 3:
12,513,515 ÷ 3 = 4,171,171.6667
If the quotient is a whole number, then 3 and 4,171,171.6667 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 | 12,513,515 | |
| -1 | -12,513,515 |
Let's try dividing by 4:
12,513,515 ÷ 4 = 3,128,378.75
If the quotient is a whole number, then 4 and 3,128,378.75 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 | 12,513,515 | |
| -1 | 12,513,515 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 47 | 235 | 329 | 1,645 | 7,607 | 38,035 | 53,249 | 266,245 | 357,529 | 1,787,645 | 2,502,703 | 12,513,515 |
| -1 | -5 | -7 | -35 | -47 | -235 | -329 | -1,645 | -7,607 | -38,035 | -53,249 | -266,245 | -357,529 | -1,787,645 | -2,502,703 | -12,513,515 |
Here are some more numbers to try:
Try the factor calculator