A:
Positive:
1 x 313888337 x 448411931 x 101254379 x 397327217 x 144649553 x 567611831 x 171432449 x 12817
Negative:
-1 x -31388833-7 x -4484119-31 x -1012543-79 x -397327-217 x -144649-553 x -56761-1831 x -17143-2449 x -12817
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 31,388,833, 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 | 31,388,833 | |
| -1 | -31,388,833 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 31,388,833.
Example:
1 x 31,388,833 = 31,388,833
and
-1 x -31,388,833 = 31,388,833
Notice both answers equal 31,388,833
With that explanation out of the way, let's continue. Next, we take the number 31,388,833 and divide it by 2:
31,388,833 ÷ 2 = 15,694,416.5
If the quotient is a whole number, then 2 and 15,694,416.5 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 | 31,388,833 | |
| -1 | -31,388,833 |
Now, we try dividing 31,388,833 by 3:
31,388,833 ÷ 3 = 10,462,944.3333
If the quotient is a whole number, then 3 and 10,462,944.3333 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 | 31,388,833 | |
| -1 | -31,388,833 |
Let's try dividing by 4:
31,388,833 ÷ 4 = 7,847,208.25
If the quotient is a whole number, then 4 and 7,847,208.25 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 | 31,388,833 | |
| -1 | 31,388,833 |
If you did it right, you will end up with this table:
| 1 | 7 | 31 | 79 | 217 | 553 | 1,831 | 2,449 | 12,817 | 17,143 | 56,761 | 144,649 | 397,327 | 1,012,543 | 4,484,119 | 31,388,833 |
| -1 | -7 | -31 | -79 | -217 | -553 | -1,831 | -2,449 | -12,817 | -17,143 | -56,761 | -144,649 | -397,327 | -1,012,543 | -4,484,119 | -31,388,833 |
Here are some more numbers to try:
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