A:
Positive:
1 x 685818077 x 979740141 x 1672727197 x 348131287 x 2389611213 x 565391379 x 497338077 x 8491
Negative:
-1 x -68581807-7 x -9797401-41 x -1672727-197 x -348131-287 x -238961-1213 x -56539-1379 x -49733-8077 x -8491
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 68,581,807, 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 | 68,581,807 | |
| -1 | -68,581,807 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 68,581,807.
Example:
1 x 68,581,807 = 68,581,807
and
-1 x -68,581,807 = 68,581,807
Notice both answers equal 68,581,807
With that explanation out of the way, let's continue. Next, we take the number 68,581,807 and divide it by 2:
68,581,807 ÷ 2 = 34,290,903.5
If the quotient is a whole number, then 2 and 34,290,903.5 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 | 68,581,807 | |
| -1 | -68,581,807 |
Now, we try dividing 68,581,807 by 3:
68,581,807 ÷ 3 = 22,860,602.3333
If the quotient is a whole number, then 3 and 22,860,602.3333 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 | 68,581,807 | |
| -1 | -68,581,807 |
Let's try dividing by 4:
68,581,807 ÷ 4 = 17,145,451.75
If the quotient is a whole number, then 4 and 17,145,451.75 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 | 68,581,807 | |
| -1 | 68,581,807 |
If you did it right, you will end up with this table:
| 1 | 7 | 41 | 197 | 287 | 1,213 | 1,379 | 8,077 | 8,491 | 49,733 | 56,539 | 238,961 | 348,131 | 1,672,727 | 9,797,401 | 68,581,807 |
| -1 | -7 | -41 | -197 | -287 | -1,213 | -1,379 | -8,077 | -8,491 | -49,733 | -56,539 | -238,961 | -348,131 | -1,672,727 | -9,797,401 | -68,581,807 |
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