A:
Positive:
1 x 314406655 x 628813331 x 1014215155 x 202843193 x 162905965 x 325811051 x 299155255 x 5983
Negative:
-1 x -31440665-5 x -6288133-31 x -1014215-155 x -202843-193 x -162905-965 x -32581-1051 x -29915-5255 x -5983
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 31,440,665, 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 | 31,440,665 | |
| -1 | -31,440,665 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 31,440,665.
Example:
1 x 31,440,665 = 31,440,665
and
-1 x -31,440,665 = 31,440,665
Notice both answers equal 31,440,665
With that explanation out of the way, let's continue. Next, we take the number 31,440,665 and divide it by 2:
31,440,665 ÷ 2 = 15,720,332.5
If the quotient is a whole number, then 2 and 15,720,332.5 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 | 31,440,665 | |
| -1 | -31,440,665 |
Now, we try dividing 31,440,665 by 3:
31,440,665 ÷ 3 = 10,480,221.6667
If the quotient is a whole number, then 3 and 10,480,221.6667 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 | 31,440,665 | |
| -1 | -31,440,665 |
Let's try dividing by 4:
31,440,665 ÷ 4 = 7,860,166.25
If the quotient is a whole number, then 4 and 7,860,166.25 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 | 31,440,665 | |
| -1 | 31,440,665 |
If you did it right, you will end up with this table:
| 1 | 5 | 31 | 155 | 193 | 965 | 1,051 | 5,255 | 5,983 | 29,915 | 32,581 | 162,905 | 202,843 | 1,014,215 | 6,288,133 | 31,440,665 |
| -1 | -5 | -31 | -155 | -193 | -965 | -1,051 | -5,255 | -5,983 | -29,915 | -32,581 | -162,905 | -202,843 | -1,014,215 | -6,288,133 | -31,440,665 |
Here are some more numbers to try:
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