A:
Positive:
1 x 8581651255 x 17163302525 x 34326605125 x 6865321397 x 21616251985 x 4323259925 x 8646517293 x 49625
Negative:
-1 x -858165125-5 x -171633025-25 x -34326605-125 x -6865321-397 x -2161625-1985 x -432325-9925 x -86465-17293 x -49625
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 858,165,125, 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 | 858,165,125 | |
| -1 | -858,165,125 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 858,165,125.
Example:
1 x 858,165,125 = 858,165,125
and
-1 x -858,165,125 = 858,165,125
Notice both answers equal 858,165,125
With that explanation out of the way, let's continue. Next, we take the number 858,165,125 and divide it by 2:
858,165,125 ÷ 2 = 429,082,562.5
If the quotient is a whole number, then 2 and 429,082,562.5 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 | 858,165,125 | |
| -1 | -858,165,125 |
Now, we try dividing 858,165,125 by 3:
858,165,125 ÷ 3 = 286,055,041.6667
If the quotient is a whole number, then 3 and 286,055,041.6667 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 | 858,165,125 | |
| -1 | -858,165,125 |
Let's try dividing by 4:
858,165,125 ÷ 4 = 214,541,281.25
If the quotient is a whole number, then 4 and 214,541,281.25 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 | 858,165,125 | |
| -1 | 858,165,125 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 125 | 397 | 1,985 | 9,925 | 17,293 | 49,625 | 86,465 | 432,325 | 2,161,625 | 6,865,321 | 34,326,605 | 171,633,025 | 858,165,125 |
| -1 | -5 | -25 | -125 | -397 | -1,985 | -9,925 | -17,293 | -49,625 | -86,465 | -432,325 | -2,161,625 | -6,865,321 | -34,326,605 | -171,633,025 | -858,165,125 |
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