A:
Positive:
1 x 1214571255 x 2429142525 x 485828537 x 3282625125 x 971657185 x 656525925 x 1313054625 x 26261
Negative:
-1 x -121457125-5 x -24291425-25 x -4858285-37 x -3282625-125 x -971657-185 x -656525-925 x -131305-4625 x -26261
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 121,457,125, 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 | 121,457,125 | |
| -1 | -121,457,125 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,457,125.
Example:
1 x 121,457,125 = 121,457,125
and
-1 x -121,457,125 = 121,457,125
Notice both answers equal 121,457,125
With that explanation out of the way, let's continue. Next, we take the number 121,457,125 and divide it by 2:
121,457,125 ÷ 2 = 60,728,562.5
If the quotient is a whole number, then 2 and 60,728,562.5 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 | 121,457,125 | |
| -1 | -121,457,125 |
Now, we try dividing 121,457,125 by 3:
121,457,125 ÷ 3 = 40,485,708.3333
If the quotient is a whole number, then 3 and 40,485,708.3333 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 | 121,457,125 | |
| -1 | -121,457,125 |
Let's try dividing by 4:
121,457,125 ÷ 4 = 30,364,281.25
If the quotient is a whole number, then 4 and 30,364,281.25 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 | 121,457,125 | |
| -1 | 121,457,125 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 37 | 125 | 185 | 925 | 4,625 | 26,261 | 131,305 | 656,525 | 971,657 | 3,282,625 | 4,858,285 | 24,291,425 | 121,457,125 |
| -1 | -5 | -25 | -37 | -125 | -185 | -925 | -4,625 | -26,261 | -131,305 | -656,525 | -971,657 | -3,282,625 | -4,858,285 | -24,291,425 | -121,457,125 |
Here are some more numbers to try:
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