A:
Positive:
1 x 8150862555 x 16301725131 x 26293105155 x 5258621599 x 13607452995 x 2721498779 x 9284518569 x 43895
Negative:
-1 x -815086255-5 x -163017251-31 x -26293105-155 x -5258621-599 x -1360745-2995 x -272149-8779 x -92845-18569 x -43895
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 815,086,255, 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 | 815,086,255 | |
| -1 | -815,086,255 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 815,086,255.
Example:
1 x 815,086,255 = 815,086,255
and
-1 x -815,086,255 = 815,086,255
Notice both answers equal 815,086,255
With that explanation out of the way, let's continue. Next, we take the number 815,086,255 and divide it by 2:
815,086,255 ÷ 2 = 407,543,127.5
If the quotient is a whole number, then 2 and 407,543,127.5 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 | 815,086,255 | |
| -1 | -815,086,255 |
Now, we try dividing 815,086,255 by 3:
815,086,255 ÷ 3 = 271,695,418.3333
If the quotient is a whole number, then 3 and 271,695,418.3333 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 | 815,086,255 | |
| -1 | -815,086,255 |
Let's try dividing by 4:
815,086,255 ÷ 4 = 203,771,563.75
If the quotient is a whole number, then 4 and 203,771,563.75 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 | 815,086,255 | |
| -1 | 815,086,255 |
If you did it right, you will end up with this table:
| 1 | 5 | 31 | 155 | 599 | 2,995 | 8,779 | 18,569 | 43,895 | 92,845 | 272,149 | 1,360,745 | 5,258,621 | 26,293,105 | 163,017,251 | 815,086,255 |
| -1 | -5 | -31 | -155 | -599 | -2,995 | -8,779 | -18,569 | -43,895 | -92,845 | -272,149 | -1,360,745 | -5,258,621 | -26,293,105 | -163,017,251 | -815,086,255 |
Here are some more numbers to try:
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