A:
Positive:
1 x 7173358155 x 1434671637 x 10247654531 x 2313986535 x 20495309155 x 4627973217 x 33056951085 x 661139
Negative:
-1 x -717335815-5 x -143467163-7 x -102476545-31 x -23139865-35 x -20495309-155 x -4627973-217 x -3305695-1085 x -661139
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 717,335,815, 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 | 717,335,815 | |
| -1 | -717,335,815 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 717,335,815.
Example:
1 x 717,335,815 = 717,335,815
and
-1 x -717,335,815 = 717,335,815
Notice both answers equal 717,335,815
With that explanation out of the way, let's continue. Next, we take the number 717,335,815 and divide it by 2:
717,335,815 ÷ 2 = 358,667,907.5
If the quotient is a whole number, then 2 and 358,667,907.5 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 | 717,335,815 | |
| -1 | -717,335,815 |
Now, we try dividing 717,335,815 by 3:
717,335,815 ÷ 3 = 239,111,938.3333
If the quotient is a whole number, then 3 and 239,111,938.3333 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 | 717,335,815 | |
| -1 | -717,335,815 |
Let's try dividing by 4:
717,335,815 ÷ 4 = 179,333,953.75
If the quotient is a whole number, then 4 and 179,333,953.75 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 | 717,335,815 | |
| -1 | 717,335,815 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 31 | 35 | 155 | 217 | 1,085 | 661,139 | 3,305,695 | 4,627,973 | 20,495,309 | 23,139,865 | 102,476,545 | 143,467,163 | 717,335,815 |
| -1 | -5 | -7 | -31 | -35 | -155 | -217 | -1,085 | -661,139 | -3,305,695 | -4,627,973 | -20,495,309 | -23,139,865 | -102,476,545 | -143,467,163 | -717,335,815 |
Here are some more numbers to try:
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