A:
Positive:
1 x 713807155 x 142761437 x 1019724535 x 2039449233 x 3063551165 x 612711631 x 437658155 x 8753
Negative:
-1 x -71380715-5 x -14276143-7 x -10197245-35 x -2039449-233 x -306355-1165 x -61271-1631 x -43765-8155 x -8753
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 71,380,715, 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 | 71,380,715 | |
| -1 | -71,380,715 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 71,380,715.
Example:
1 x 71,380,715 = 71,380,715
and
-1 x -71,380,715 = 71,380,715
Notice both answers equal 71,380,715
With that explanation out of the way, let's continue. Next, we take the number 71,380,715 and divide it by 2:
71,380,715 ÷ 2 = 35,690,357.5
If the quotient is a whole number, then 2 and 35,690,357.5 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 | 71,380,715 | |
| -1 | -71,380,715 |
Now, we try dividing 71,380,715 by 3:
71,380,715 ÷ 3 = 23,793,571.6667
If the quotient is a whole number, then 3 and 23,793,571.6667 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 | 71,380,715 | |
| -1 | -71,380,715 |
Let's try dividing by 4:
71,380,715 ÷ 4 = 17,845,178.75
If the quotient is a whole number, then 4 and 17,845,178.75 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 | 71,380,715 | |
| -1 | 71,380,715 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 233 | 1,165 | 1,631 | 8,155 | 8,753 | 43,765 | 61,271 | 306,355 | 2,039,449 | 10,197,245 | 14,276,143 | 71,380,715 |
| -1 | -5 | -7 | -35 | -233 | -1,165 | -1,631 | -8,155 | -8,753 | -43,765 | -61,271 | -306,355 | -2,039,449 | -10,197,245 | -14,276,143 | -71,380,715 |
Here are some more numbers to try:
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