A:
Positive:
1 x 126886255 x 253772525 x 50754583 x 152875125 x 101509415 x 305751223 x 103752075 x 6115
Negative:
-1 x -12688625-5 x -2537725-25 x -507545-83 x -152875-125 x -101509-415 x -30575-1223 x -10375-2075 x -6115
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 12,688,625, 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 | 12,688,625 | |
| -1 | -12,688,625 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,688,625.
Example:
1 x 12,688,625 = 12,688,625
and
-1 x -12,688,625 = 12,688,625
Notice both answers equal 12,688,625
With that explanation out of the way, let's continue. Next, we take the number 12,688,625 and divide it by 2:
12,688,625 ÷ 2 = 6,344,312.5
If the quotient is a whole number, then 2 and 6,344,312.5 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 | 12,688,625 | |
| -1 | -12,688,625 |
Now, we try dividing 12,688,625 by 3:
12,688,625 ÷ 3 = 4,229,541.6667
If the quotient is a whole number, then 3 and 4,229,541.6667 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 | 12,688,625 | |
| -1 | -12,688,625 |
Let's try dividing by 4:
12,688,625 ÷ 4 = 3,172,156.25
If the quotient is a whole number, then 4 and 3,172,156.25 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 | 12,688,625 | |
| -1 | 12,688,625 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 83 | 125 | 415 | 1,223 | 2,075 | 6,115 | 10,375 | 30,575 | 101,509 | 152,875 | 507,545 | 2,537,725 | 12,688,625 |
| -1 | -5 | -25 | -83 | -125 | -415 | -1,223 | -2,075 | -6,115 | -10,375 | -30,575 | -101,509 | -152,875 | -507,545 | -2,537,725 | -12,688,625 |
Here are some more numbers to try:
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