A:
Positive:
1 x 7206821155 x 14413642323 x 3133400537 x 19477895115 x 6266801185 x 3895579851 x 8468654255 x 169373
Negative:
-1 x -720682115-5 x -144136423-23 x -31334005-37 x -19477895-115 x -6266801-185 x -3895579-851 x -846865-4255 x -169373
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 720,682,115, 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 | 720,682,115 | |
| -1 | -720,682,115 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 720,682,115.
Example:
1 x 720,682,115 = 720,682,115
and
-1 x -720,682,115 = 720,682,115
Notice both answers equal 720,682,115
With that explanation out of the way, let's continue. Next, we take the number 720,682,115 and divide it by 2:
720,682,115 ÷ 2 = 360,341,057.5
If the quotient is a whole number, then 2 and 360,341,057.5 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 | 720,682,115 | |
| -1 | -720,682,115 |
Now, we try dividing 720,682,115 by 3:
720,682,115 ÷ 3 = 240,227,371.6667
If the quotient is a whole number, then 3 and 240,227,371.6667 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 | 720,682,115 | |
| -1 | -720,682,115 |
Let's try dividing by 4:
720,682,115 ÷ 4 = 180,170,528.75
If the quotient is a whole number, then 4 and 180,170,528.75 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 | 720,682,115 | |
| -1 | 720,682,115 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 37 | 115 | 185 | 851 | 4,255 | 169,373 | 846,865 | 3,895,579 | 6,266,801 | 19,477,895 | 31,334,005 | 144,136,423 | 720,682,115 |
| -1 | -5 | -23 | -37 | -115 | -185 | -851 | -4,255 | -169,373 | -846,865 | -3,895,579 | -6,266,801 | -19,477,895 | -31,334,005 | -144,136,423 | -720,682,115 |
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