A:
Positive:
1 x 1212786255 x 2425572513 x 932912525 x 485114565 x 1865825125 x 970229169 x 717625325 x 373165845 x 1435251625 x 746334225 x 287055741 x 21125
Negative:
-1 x -121278625-5 x -24255725-13 x -9329125-25 x -4851145-65 x -1865825-125 x -970229-169 x -717625-325 x -373165-845 x -143525-1625 x -74633-4225 x -28705-5741 x -21125
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 121,278,625, 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 | 121,278,625 | |
| -1 | -121,278,625 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,278,625.
Example:
1 x 121,278,625 = 121,278,625
and
-1 x -121,278,625 = 121,278,625
Notice both answers equal 121,278,625
With that explanation out of the way, let's continue. Next, we take the number 121,278,625 and divide it by 2:
121,278,625 ÷ 2 = 60,639,312.5
If the quotient is a whole number, then 2 and 60,639,312.5 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 | 121,278,625 | |
| -1 | -121,278,625 |
Now, we try dividing 121,278,625 by 3:
121,278,625 ÷ 3 = 40,426,208.3333
If the quotient is a whole number, then 3 and 40,426,208.3333 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 | 121,278,625 | |
| -1 | -121,278,625 |
Let's try dividing by 4:
121,278,625 ÷ 4 = 30,319,656.25
If the quotient is a whole number, then 4 and 30,319,656.25 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 | 121,278,625 | |
| -1 | 121,278,625 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 25 | 65 | 125 | 169 | 325 | 845 | 1,625 | 4,225 | 5,741 | 21,125 | 28,705 | 74,633 | 143,525 | 373,165 | 717,625 | 970,229 | 1,865,825 | 4,851,145 | 9,329,125 | 24,255,725 | 121,278,625 |
| -1 | -5 | -13 | -25 | -65 | -125 | -169 | -325 | -845 | -1,625 | -4,225 | -5,741 | -21,125 | -28,705 | -74,633 | -143,525 | -373,165 | -717,625 | -970,229 | -1,865,825 | -4,851,145 | -9,329,125 | -24,255,725 | -121,278,625 |
Here are some more numbers to try:
Try the factor calculator