A:
Positive:
1 x 643701255 x 1287402525 x 2574805125 x 514961131 x 491375655 x 982753275 x 196553931 x 16375
Negative:
-1 x -64370125-5 x -12874025-25 x -2574805-125 x -514961-131 x -491375-655 x -98275-3275 x -19655-3931 x -16375
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 64,370,125, 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 | 64,370,125 | |
| -1 | -64,370,125 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 64,370,125.
Example:
1 x 64,370,125 = 64,370,125
and
-1 x -64,370,125 = 64,370,125
Notice both answers equal 64,370,125
With that explanation out of the way, let's continue. Next, we take the number 64,370,125 and divide it by 2:
64,370,125 ÷ 2 = 32,185,062.5
If the quotient is a whole number, then 2 and 32,185,062.5 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 | 64,370,125 | |
| -1 | -64,370,125 |
Now, we try dividing 64,370,125 by 3:
64,370,125 ÷ 3 = 21,456,708.3333
If the quotient is a whole number, then 3 and 21,456,708.3333 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 | 64,370,125 | |
| -1 | -64,370,125 |
Let's try dividing by 4:
64,370,125 ÷ 4 = 16,092,531.25
If the quotient is a whole number, then 4 and 16,092,531.25 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 | 64,370,125 | |
| -1 | 64,370,125 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 125 | 131 | 655 | 3,275 | 3,931 | 16,375 | 19,655 | 98,275 | 491,375 | 514,961 | 2,574,805 | 12,874,025 | 64,370,125 |
| -1 | -5 | -25 | -125 | -131 | -655 | -3,275 | -3,931 | -16,375 | -19,655 | -98,275 | -491,375 | -514,961 | -2,574,805 | -12,874,025 | -64,370,125 |
Here are some more numbers to try:
Try the factor calculator