A:
Positive:
1 x 7157576155 x 14315152359 x 12131485295 x 2426297521 x 13738152605 x 2747634657 x 15369523285 x 30739
Negative:
-1 x -715757615-5 x -143151523-59 x -12131485-295 x -2426297-521 x -1373815-2605 x -274763-4657 x -153695-23285 x -30739
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 715,757,615, 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 | 715,757,615 | |
| -1 | -715,757,615 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 715,757,615.
Example:
1 x 715,757,615 = 715,757,615
and
-1 x -715,757,615 = 715,757,615
Notice both answers equal 715,757,615
With that explanation out of the way, let's continue. Next, we take the number 715,757,615 and divide it by 2:
715,757,615 ÷ 2 = 357,878,807.5
If the quotient is a whole number, then 2 and 357,878,807.5 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 | 715,757,615 | |
| -1 | -715,757,615 |
Now, we try dividing 715,757,615 by 3:
715,757,615 ÷ 3 = 238,585,871.6667
If the quotient is a whole number, then 3 and 238,585,871.6667 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 | 715,757,615 | |
| -1 | -715,757,615 |
Let's try dividing by 4:
715,757,615 ÷ 4 = 178,939,403.75
If the quotient is a whole number, then 4 and 178,939,403.75 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 | 715,757,615 | |
| -1 | 715,757,615 |
If you did it right, you will end up with this table:
| 1 | 5 | 59 | 295 | 521 | 2,605 | 4,657 | 23,285 | 30,739 | 153,695 | 274,763 | 1,373,815 | 2,426,297 | 12,131,485 | 143,151,523 | 715,757,615 |
| -1 | -5 | -59 | -295 | -521 | -2,605 | -4,657 | -23,285 | -30,739 | -153,695 | -274,763 | -1,373,815 | -2,426,297 | -12,131,485 | -143,151,523 | -715,757,615 |
Here are some more numbers to try:
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