A:
Positive:
1 x 71799119 x 3778923 x 3121731 x 2316153 x 13547437 x 1643589 x 1219713 x 1007
Negative:
-1 x -717991-19 x -37789-23 x -31217-31 x -23161-53 x -13547-437 x -1643-589 x -1219-713 x -1007
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 717,991, 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 | 717,991 | |
| -1 | -717,991 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 717,991.
Example:
1 x 717,991 = 717,991
and
-1 x -717,991 = 717,991
Notice both answers equal 717,991
With that explanation out of the way, let's continue. Next, we take the number 717,991 and divide it by 2:
717,991 ÷ 2 = 358,995.5
If the quotient is a whole number, then 2 and 358,995.5 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 | 717,991 | |
| -1 | -717,991 |
Now, we try dividing 717,991 by 3:
717,991 ÷ 3 = 239,330.3333
If the quotient is a whole number, then 3 and 239,330.3333 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 | 717,991 | |
| -1 | -717,991 |
Let's try dividing by 4:
717,991 ÷ 4 = 179,497.75
If the quotient is a whole number, then 4 and 179,497.75 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 | 717,991 | |
| -1 | 717,991 |
If you did it right, you will end up with this table:
| 1 | 19 | 23 | 31 | 53 | 437 | 589 | 713 | 1,007 | 1,219 | 1,643 | 13,547 | 23,161 | 31,217 | 37,789 | 717,991 |
| -1 | -19 | -23 | -31 | -53 | -437 | -589 | -713 | -1,007 | -1,219 | -1,643 | -13,547 | -23,161 | -31,217 | -37,789 | -717,991 |
Here are some more numbers to try:
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