A:
Positive:
1 x 6865577755 x 13731155525 x 2746231131 x 22147025155 x 4429405775 x 885881
Negative:
-1 x -686557775-5 x -137311555-25 x -27462311-31 x -22147025-155 x -4429405-775 x -885881
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 686,557,775, 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 | 686,557,775 | |
| -1 | -686,557,775 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 686,557,775.
Example:
1 x 686,557,775 = 686,557,775
and
-1 x -686,557,775 = 686,557,775
Notice both answers equal 686,557,775
With that explanation out of the way, let's continue. Next, we take the number 686,557,775 and divide it by 2:
686,557,775 ÷ 2 = 343,278,887.5
If the quotient is a whole number, then 2 and 343,278,887.5 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 | 686,557,775 | |
| -1 | -686,557,775 |
Now, we try dividing 686,557,775 by 3:
686,557,775 ÷ 3 = 228,852,591.6667
If the quotient is a whole number, then 3 and 228,852,591.6667 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 | 686,557,775 | |
| -1 | -686,557,775 |
Let's try dividing by 4:
686,557,775 ÷ 4 = 171,639,443.75
If the quotient is a whole number, then 4 and 171,639,443.75 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 | 686,557,775 | |
| -1 | 686,557,775 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 31 | 155 | 775 | 885,881 | 4,429,405 | 22,147,025 | 27,462,311 | 137,311,555 | 686,557,775 |
| -1 | -5 | -25 | -31 | -155 | -775 | -885,881 | -4,429,405 | -22,147,025 | -27,462,311 | -137,311,555 | -686,557,775 |
Here are some more numbers to try:
Try the factor calculator