A:
Positive:
1 x 7207251355 x 14414502713 x 5544039565 x 11088079349 x 20651151745 x 4130234537 x 15885522685 x 31771
Negative:
-1 x -720725135-5 x -144145027-13 x -55440395-65 x -11088079-349 x -2065115-1745 x -413023-4537 x -158855-22685 x -31771
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 720,725,135, 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 | 720,725,135 | |
| -1 | -720,725,135 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 720,725,135.
Example:
1 x 720,725,135 = 720,725,135
and
-1 x -720,725,135 = 720,725,135
Notice both answers equal 720,725,135
With that explanation out of the way, let's continue. Next, we take the number 720,725,135 and divide it by 2:
720,725,135 ÷ 2 = 360,362,567.5
If the quotient is a whole number, then 2 and 360,362,567.5 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 | 720,725,135 | |
| -1 | -720,725,135 |
Now, we try dividing 720,725,135 by 3:
720,725,135 ÷ 3 = 240,241,711.6667
If the quotient is a whole number, then 3 and 240,241,711.6667 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 | 720,725,135 | |
| -1 | -720,725,135 |
Let's try dividing by 4:
720,725,135 ÷ 4 = 180,181,283.75
If the quotient is a whole number, then 4 and 180,181,283.75 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 | 720,725,135 | |
| -1 | 720,725,135 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 349 | 1,745 | 4,537 | 22,685 | 31,771 | 158,855 | 413,023 | 2,065,115 | 11,088,079 | 55,440,395 | 144,145,027 | 720,725,135 |
| -1 | -5 | -13 | -65 | -349 | -1,745 | -4,537 | -22,685 | -31,771 | -158,855 | -413,023 | -2,065,115 | -11,088,079 | -55,440,395 | -144,145,027 | -720,725,135 |
Here are some more numbers to try:
Try the factor calculator