A:
Positive:
1 x 2483151255 x 4966302525 x 9932605125 x 1986521157 x 1581625785 x 3163253925 x 6326512653 x 19625
Negative:
-1 x -248315125-5 x -49663025-25 x -9932605-125 x -1986521-157 x -1581625-785 x -316325-3925 x -63265-12653 x -19625
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 248,315,125, 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 | 248,315,125 | |
| -1 | -248,315,125 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 248,315,125.
Example:
1 x 248,315,125 = 248,315,125
and
-1 x -248,315,125 = 248,315,125
Notice both answers equal 248,315,125
With that explanation out of the way, let's continue. Next, we take the number 248,315,125 and divide it by 2:
248,315,125 ÷ 2 = 124,157,562.5
If the quotient is a whole number, then 2 and 124,157,562.5 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 | 248,315,125 | |
| -1 | -248,315,125 |
Now, we try dividing 248,315,125 by 3:
248,315,125 ÷ 3 = 82,771,708.3333
If the quotient is a whole number, then 3 and 82,771,708.3333 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 | 248,315,125 | |
| -1 | -248,315,125 |
Let's try dividing by 4:
248,315,125 ÷ 4 = 62,078,781.25
If the quotient is a whole number, then 4 and 62,078,781.25 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 | 248,315,125 | |
| -1 | 248,315,125 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 125 | 157 | 785 | 3,925 | 12,653 | 19,625 | 63,265 | 316,325 | 1,581,625 | 1,986,521 | 9,932,605 | 49,663,025 | 248,315,125 |
| -1 | -5 | -25 | -125 | -157 | -785 | -3,925 | -12,653 | -19,625 | -63,265 | -316,325 | -1,581,625 | -1,986,521 | -9,932,605 | -49,663,025 | -248,315,125 |
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