A:
Positive:
1 x 6888663555 x 13777327197 x 7101715485 x 1420343769 x 8957951847 x 3729653845 x 1791599235 x 74593
Negative:
-1 x -688866355-5 x -137773271-97 x -7101715-485 x -1420343-769 x -895795-1847 x -372965-3845 x -179159-9235 x -74593
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 688,866,355, 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 | 688,866,355 | |
| -1 | -688,866,355 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 688,866,355.
Example:
1 x 688,866,355 = 688,866,355
and
-1 x -688,866,355 = 688,866,355
Notice both answers equal 688,866,355
With that explanation out of the way, let's continue. Next, we take the number 688,866,355 and divide it by 2:
688,866,355 ÷ 2 = 344,433,177.5
If the quotient is a whole number, then 2 and 344,433,177.5 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 | 688,866,355 | |
| -1 | -688,866,355 |
Now, we try dividing 688,866,355 by 3:
688,866,355 ÷ 3 = 229,622,118.3333
If the quotient is a whole number, then 3 and 229,622,118.3333 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 | 688,866,355 | |
| -1 | -688,866,355 |
Let's try dividing by 4:
688,866,355 ÷ 4 = 172,216,588.75
If the quotient is a whole number, then 4 and 172,216,588.75 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 | 688,866,355 | |
| -1 | 688,866,355 |
If you did it right, you will end up with this table:
| 1 | 5 | 97 | 485 | 769 | 1,847 | 3,845 | 9,235 | 74,593 | 179,159 | 372,965 | 895,795 | 1,420,343 | 7,101,715 | 137,773,271 | 688,866,355 |
| -1 | -5 | -97 | -485 | -769 | -1,847 | -3,845 | -9,235 | -74,593 | -179,159 | -372,965 | -895,795 | -1,420,343 | -7,101,715 | -137,773,271 | -688,866,355 |
Here are some more numbers to try:
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