A:
Positive:
1 x 124021317 x 177173341 x 30249179 x 156989287 x 43213547 x 22673553 x 224273239 x 3829
Negative:
-1 x -12402131-7 x -1771733-41 x -302491-79 x -156989-287 x -43213-547 x -22673-553 x -22427-3239 x -3829
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 12,402,131, 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 | 12,402,131 | |
| -1 | -12,402,131 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,402,131.
Example:
1 x 12,402,131 = 12,402,131
and
-1 x -12,402,131 = 12,402,131
Notice both answers equal 12,402,131
With that explanation out of the way, let's continue. Next, we take the number 12,402,131 and divide it by 2:
12,402,131 ÷ 2 = 6,201,065.5
If the quotient is a whole number, then 2 and 6,201,065.5 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 | 12,402,131 | |
| -1 | -12,402,131 |
Now, we try dividing 12,402,131 by 3:
12,402,131 ÷ 3 = 4,134,043.6667
If the quotient is a whole number, then 3 and 4,134,043.6667 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 | 12,402,131 | |
| -1 | -12,402,131 |
Let's try dividing by 4:
12,402,131 ÷ 4 = 3,100,532.75
If the quotient is a whole number, then 4 and 3,100,532.75 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 | 12,402,131 | |
| -1 | 12,402,131 |
If you did it right, you will end up with this table:
| 1 | 7 | 41 | 79 | 287 | 547 | 553 | 3,239 | 3,829 | 22,427 | 22,673 | 43,213 | 156,989 | 302,491 | 1,771,733 | 12,402,131 |
| -1 | -7 | -41 | -79 | -287 | -547 | -553 | -3,239 | -3,829 | -22,427 | -22,673 | -43,213 | -156,989 | -302,491 | -1,771,733 | -12,402,131 |
Here are some more numbers to try:
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