A:
Positive:
1 x 722522155 x 144504437 x 1032174535 x 206434949 x 147453579 x 914585245 x 294907395 x 182917553 x 1306552765 x 261313733 x 193553871 x 18665
Negative:
-1 x -72252215-5 x -14450443-7 x -10321745-35 x -2064349-49 x -1474535-79 x -914585-245 x -294907-395 x -182917-553 x -130655-2765 x -26131-3733 x -19355-3871 x -18665
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 72,252,215, 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 | 72,252,215 | |
| -1 | -72,252,215 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 72,252,215.
Example:
1 x 72,252,215 = 72,252,215
and
-1 x -72,252,215 = 72,252,215
Notice both answers equal 72,252,215
With that explanation out of the way, let's continue. Next, we take the number 72,252,215 and divide it by 2:
72,252,215 ÷ 2 = 36,126,107.5
If the quotient is a whole number, then 2 and 36,126,107.5 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 | 72,252,215 | |
| -1 | -72,252,215 |
Now, we try dividing 72,252,215 by 3:
72,252,215 ÷ 3 = 24,084,071.6667
If the quotient is a whole number, then 3 and 24,084,071.6667 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 | 72,252,215 | |
| -1 | -72,252,215 |
Let's try dividing by 4:
72,252,215 ÷ 4 = 18,063,053.75
If the quotient is a whole number, then 4 and 18,063,053.75 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 | 72,252,215 | |
| -1 | 72,252,215 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 49 | 79 | 245 | 395 | 553 | 2,765 | 3,733 | 3,871 | 18,665 | 19,355 | 26,131 | 130,655 | 182,917 | 294,907 | 914,585 | 1,474,535 | 2,064,349 | 10,321,745 | 14,450,443 | 72,252,215 |
| -1 | -5 | -7 | -35 | -49 | -79 | -245 | -395 | -553 | -2,765 | -3,733 | -3,871 | -18,665 | -19,355 | -26,131 | -130,655 | -182,917 | -294,907 | -914,585 | -1,474,535 | -2,064,349 | -10,321,745 | -14,450,443 | -72,252,215 |
Here are some more numbers to try:
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