A:
Positive:
1 x 8117800397 x 11596857717 x 47751767119 x 6821681229 x 35448911603 x 5064133893 x 20852327251 x 29789
Negative:
-1 x -811780039-7 x -115968577-17 x -47751767-119 x -6821681-229 x -3544891-1603 x -506413-3893 x -208523-27251 x -29789
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 811,780,039, 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 | 811,780,039 | |
| -1 | -811,780,039 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 811,780,039.
Example:
1 x 811,780,039 = 811,780,039
and
-1 x -811,780,039 = 811,780,039
Notice both answers equal 811,780,039
With that explanation out of the way, let's continue. Next, we take the number 811,780,039 and divide it by 2:
811,780,039 ÷ 2 = 405,890,019.5
If the quotient is a whole number, then 2 and 405,890,019.5 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 | 811,780,039 | |
| -1 | -811,780,039 |
Now, we try dividing 811,780,039 by 3:
811,780,039 ÷ 3 = 270,593,346.3333
If the quotient is a whole number, then 3 and 270,593,346.3333 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 | 811,780,039 | |
| -1 | -811,780,039 |
Let's try dividing by 4:
811,780,039 ÷ 4 = 202,945,009.75
If the quotient is a whole number, then 4 and 202,945,009.75 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 | 811,780,039 | |
| -1 | 811,780,039 |
If you did it right, you will end up with this table:
| 1 | 7 | 17 | 119 | 229 | 1,603 | 3,893 | 27,251 | 29,789 | 208,523 | 506,413 | 3,544,891 | 6,821,681 | 47,751,767 | 115,968,577 | 811,780,039 |
| -1 | -7 | -17 | -119 | -229 | -1,603 | -3,893 | -27,251 | -29,789 | -208,523 | -506,413 | -3,544,891 | -6,821,681 | -47,751,767 | -115,968,577 | -811,780,039 |
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