A:
Positive:
1 x 725980155 x 145196037 x 1037114535 x 2074229149 x 487235745 x 974471043 x 696055215 x 13921
Negative:
-1 x -72598015-5 x -14519603-7 x -10371145-35 x -2074229-149 x -487235-745 x -97447-1043 x -69605-5215 x -13921
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 72,598,015, 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 | 72,598,015 | |
| -1 | -72,598,015 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 72,598,015.
Example:
1 x 72,598,015 = 72,598,015
and
-1 x -72,598,015 = 72,598,015
Notice both answers equal 72,598,015
With that explanation out of the way, let's continue. Next, we take the number 72,598,015 and divide it by 2:
72,598,015 ÷ 2 = 36,299,007.5
If the quotient is a whole number, then 2 and 36,299,007.5 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 | 72,598,015 | |
| -1 | -72,598,015 |
Now, we try dividing 72,598,015 by 3:
72,598,015 ÷ 3 = 24,199,338.3333
If the quotient is a whole number, then 3 and 24,199,338.3333 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 | 72,598,015 | |
| -1 | -72,598,015 |
Let's try dividing by 4:
72,598,015 ÷ 4 = 18,149,503.75
If the quotient is a whole number, then 4 and 18,149,503.75 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 | 72,598,015 | |
| -1 | 72,598,015 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 149 | 745 | 1,043 | 5,215 | 13,921 | 69,605 | 97,447 | 487,235 | 2,074,229 | 10,371,145 | 14,519,603 | 72,598,015 |
| -1 | -5 | -7 | -35 | -149 | -745 | -1,043 | -5,215 | -13,921 | -69,605 | -97,447 | -487,235 | -2,074,229 | -10,371,145 | -14,519,603 | -72,598,015 |
Here are some more numbers to try:
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