A:
Positive:
1 x 727016655 x 1454033331 x 2345215155 x 469043199 x 365335995 x 730672357 x 308456169 x 11785
Negative:
-1 x -72701665-5 x -14540333-31 x -2345215-155 x -469043-199 x -365335-995 x -73067-2357 x -30845-6169 x -11785
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 72,701,665, 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 | 72,701,665 | |
| -1 | -72,701,665 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 72,701,665.
Example:
1 x 72,701,665 = 72,701,665
and
-1 x -72,701,665 = 72,701,665
Notice both answers equal 72,701,665
With that explanation out of the way, let's continue. Next, we take the number 72,701,665 and divide it by 2:
72,701,665 ÷ 2 = 36,350,832.5
If the quotient is a whole number, then 2 and 36,350,832.5 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 | 72,701,665 | |
| -1 | -72,701,665 |
Now, we try dividing 72,701,665 by 3:
72,701,665 ÷ 3 = 24,233,888.3333
If the quotient is a whole number, then 3 and 24,233,888.3333 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 | 72,701,665 | |
| -1 | -72,701,665 |
Let's try dividing by 4:
72,701,665 ÷ 4 = 18,175,416.25
If the quotient is a whole number, then 4 and 18,175,416.25 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 | 72,701,665 | |
| -1 | 72,701,665 |
If you did it right, you will end up with this table:
| 1 | 5 | 31 | 155 | 199 | 995 | 2,357 | 6,169 | 11,785 | 30,845 | 73,067 | 365,335 | 469,043 | 2,345,215 | 14,540,333 | 72,701,665 |
| -1 | -5 | -31 | -155 | -199 | -995 | -2,357 | -6,169 | -11,785 | -30,845 | -73,067 | -365,335 | -469,043 | -2,345,215 | -14,540,333 | -72,701,665 |
Here are some more numbers to try:
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