A:
Positive:
1 x 131277255 x 262554513 x 100982525 x 52510931 x 42347565 x 201965155 x 84695325 x 40393403 x 32575775 x 169391303 x 100752015 x 6515
Negative:
-1 x -13127725-5 x -2625545-13 x -1009825-25 x -525109-31 x -423475-65 x -201965-155 x -84695-325 x -40393-403 x -32575-775 x -16939-1303 x -10075-2015 x -6515
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 13,127,725, 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 | 13,127,725 | |
| -1 | -13,127,725 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 13,127,725.
Example:
1 x 13,127,725 = 13,127,725
and
-1 x -13,127,725 = 13,127,725
Notice both answers equal 13,127,725
With that explanation out of the way, let's continue. Next, we take the number 13,127,725 and divide it by 2:
13,127,725 ÷ 2 = 6,563,862.5
If the quotient is a whole number, then 2 and 6,563,862.5 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 | 13,127,725 | |
| -1 | -13,127,725 |
Now, we try dividing 13,127,725 by 3:
13,127,725 ÷ 3 = 4,375,908.3333
If the quotient is a whole number, then 3 and 4,375,908.3333 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 | 13,127,725 | |
| -1 | -13,127,725 |
Let's try dividing by 4:
13,127,725 ÷ 4 = 3,281,931.25
If the quotient is a whole number, then 4 and 3,281,931.25 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 | 13,127,725 | |
| -1 | 13,127,725 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 25 | 31 | 65 | 155 | 325 | 403 | 775 | 1,303 | 2,015 | 6,515 | 10,075 | 16,939 | 32,575 | 40,393 | 84,695 | 201,965 | 423,475 | 525,109 | 1,009,825 | 2,625,545 | 13,127,725 |
| -1 | -5 | -13 | -25 | -31 | -65 | -155 | -325 | -403 | -775 | -1,303 | -2,015 | -6,515 | -10,075 | -16,939 | -32,575 | -40,393 | -84,695 | -201,965 | -423,475 | -525,109 | -1,009,825 | -2,625,545 | -13,127,725 |
Here are some more numbers to try:
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