A:
Positive:
1 x 7217487717 x 424558159 x 1223303227 x 317951317 x 2276811003 x 719593859 x 187035389 x 13393
Negative:
-1 x -72174877-17 x -4245581-59 x -1223303-227 x -317951-317 x -227681-1003 x -71959-3859 x -18703-5389 x -13393
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 72,174,877, 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 | 72,174,877 | |
| -1 | -72,174,877 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 72,174,877.
Example:
1 x 72,174,877 = 72,174,877
and
-1 x -72,174,877 = 72,174,877
Notice both answers equal 72,174,877
With that explanation out of the way, let's continue. Next, we take the number 72,174,877 and divide it by 2:
72,174,877 ÷ 2 = 36,087,438.5
If the quotient is a whole number, then 2 and 36,087,438.5 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 | 72,174,877 | |
| -1 | -72,174,877 |
Now, we try dividing 72,174,877 by 3:
72,174,877 ÷ 3 = 24,058,292.3333
If the quotient is a whole number, then 3 and 24,058,292.3333 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 | 72,174,877 | |
| -1 | -72,174,877 |
Let's try dividing by 4:
72,174,877 ÷ 4 = 18,043,719.25
If the quotient is a whole number, then 4 and 18,043,719.25 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 | 72,174,877 | |
| -1 | 72,174,877 |
If you did it right, you will end up with this table:
| 1 | 17 | 59 | 227 | 317 | 1,003 | 3,859 | 5,389 | 13,393 | 18,703 | 71,959 | 227,681 | 317,951 | 1,223,303 | 4,245,581 | 72,174,877 |
| -1 | -17 | -59 | -227 | -317 | -1,003 | -3,859 | -5,389 | -13,393 | -18,703 | -71,959 | -227,681 | -317,951 | -1,223,303 | -4,245,581 | -72,174,877 |
Here are some more numbers to try:
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