A:
Positive:
1 x 121329855 x 242659717 x 71370585 x 142741349 x 34765409 x 296651745 x 69532045 x 5933
Negative:
-1 x -12132985-5 x -2426597-17 x -713705-85 x -142741-349 x -34765-409 x -29665-1745 x -6953-2045 x -5933
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 12,132,985, 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 | 12,132,985 | |
| -1 | -12,132,985 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,132,985.
Example:
1 x 12,132,985 = 12,132,985
and
-1 x -12,132,985 = 12,132,985
Notice both answers equal 12,132,985
With that explanation out of the way, let's continue. Next, we take the number 12,132,985 and divide it by 2:
12,132,985 ÷ 2 = 6,066,492.5
If the quotient is a whole number, then 2 and 6,066,492.5 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 | 12,132,985 | |
| -1 | -12,132,985 |
Now, we try dividing 12,132,985 by 3:
12,132,985 ÷ 3 = 4,044,328.3333
If the quotient is a whole number, then 3 and 4,044,328.3333 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 | 12,132,985 | |
| -1 | -12,132,985 |
Let's try dividing by 4:
12,132,985 ÷ 4 = 3,033,246.25
If the quotient is a whole number, then 4 and 3,033,246.25 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 | 12,132,985 | |
| -1 | 12,132,985 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 85 | 349 | 409 | 1,745 | 2,045 | 5,933 | 6,953 | 29,665 | 34,765 | 142,741 | 713,705 | 2,426,597 | 12,132,985 |
| -1 | -5 | -17 | -85 | -349 | -409 | -1,745 | -2,045 | -5,933 | -6,953 | -29,665 | -34,765 | -142,741 | -713,705 | -2,426,597 | -12,132,985 |
Here are some more numbers to try:
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