A:
Positive:
1 x 312067555 x 624135129 x 107609583 x 375985145 x 215219415 x 751972407 x 129652593 x 12035
Negative:
-1 x -31206755-5 x -6241351-29 x -1076095-83 x -375985-145 x -215219-415 x -75197-2407 x -12965-2593 x -12035
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 31,206,755, 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 | 31,206,755 | |
| -1 | -31,206,755 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 31,206,755.
Example:
1 x 31,206,755 = 31,206,755
and
-1 x -31,206,755 = 31,206,755
Notice both answers equal 31,206,755
With that explanation out of the way, let's continue. Next, we take the number 31,206,755 and divide it by 2:
31,206,755 ÷ 2 = 15,603,377.5
If the quotient is a whole number, then 2 and 15,603,377.5 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 | 31,206,755 | |
| -1 | -31,206,755 |
Now, we try dividing 31,206,755 by 3:
31,206,755 ÷ 3 = 10,402,251.6667
If the quotient is a whole number, then 3 and 10,402,251.6667 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 | 31,206,755 | |
| -1 | -31,206,755 |
Let's try dividing by 4:
31,206,755 ÷ 4 = 7,801,688.75
If the quotient is a whole number, then 4 and 7,801,688.75 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 | 31,206,755 | |
| -1 | 31,206,755 |
If you did it right, you will end up with this table:
| 1 | 5 | 29 | 83 | 145 | 415 | 2,407 | 2,593 | 12,035 | 12,965 | 75,197 | 215,219 | 375,985 | 1,076,095 | 6,241,351 | 31,206,755 |
| -1 | -5 | -29 | -83 | -145 | -415 | -2,407 | -2,593 | -12,035 | -12,965 | -75,197 | -215,219 | -375,985 | -1,076,095 | -6,241,351 | -31,206,755 |
Here are some more numbers to try:
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