A:
Positive:
1 x 128660155 x 257320347 x 27374553 x 242755235 x 54749265 x 485511033 x 124552491 x 5165
Negative:
-1 x -12866015-5 x -2573203-47 x -273745-53 x -242755-235 x -54749-265 x -48551-1033 x -12455-2491 x -5165
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 12,866,015, 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 | 12,866,015 | |
| -1 | -12,866,015 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,866,015.
Example:
1 x 12,866,015 = 12,866,015
and
-1 x -12,866,015 = 12,866,015
Notice both answers equal 12,866,015
With that explanation out of the way, let's continue. Next, we take the number 12,866,015 and divide it by 2:
12,866,015 ÷ 2 = 6,433,007.5
If the quotient is a whole number, then 2 and 6,433,007.5 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 | 12,866,015 | |
| -1 | -12,866,015 |
Now, we try dividing 12,866,015 by 3:
12,866,015 ÷ 3 = 4,288,671.6667
If the quotient is a whole number, then 3 and 4,288,671.6667 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 | 12,866,015 | |
| -1 | -12,866,015 |
Let's try dividing by 4:
12,866,015 ÷ 4 = 3,216,503.75
If the quotient is a whole number, then 4 and 3,216,503.75 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 | 12,866,015 | |
| -1 | 12,866,015 |
If you did it right, you will end up with this table:
| 1 | 5 | 47 | 53 | 235 | 265 | 1,033 | 2,491 | 5,165 | 12,455 | 48,551 | 54,749 | 242,755 | 273,745 | 2,573,203 | 12,866,015 |
| -1 | -5 | -47 | -53 | -235 | -265 | -1,033 | -2,491 | -5,165 | -12,455 | -48,551 | -54,749 | -242,755 | -273,745 | -2,573,203 | -12,866,015 |
Here are some more numbers to try:
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