A:
Positive:
1 x 316631217 x 452330331 x 102139179 x 400799217 x 145913553 x 572571847 x 171432449 x 12929
Negative:
-1 x -31663121-7 x -4523303-31 x -1021391-79 x -400799-217 x -145913-553 x -57257-1847 x -17143-2449 x -12929
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 31,663,121, 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 | 31,663,121 | |
| -1 | -31,663,121 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 31,663,121.
Example:
1 x 31,663,121 = 31,663,121
and
-1 x -31,663,121 = 31,663,121
Notice both answers equal 31,663,121
With that explanation out of the way, let's continue. Next, we take the number 31,663,121 and divide it by 2:
31,663,121 ÷ 2 = 15,831,560.5
If the quotient is a whole number, then 2 and 15,831,560.5 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 | 31,663,121 | |
| -1 | -31,663,121 |
Now, we try dividing 31,663,121 by 3:
31,663,121 ÷ 3 = 10,554,373.6667
If the quotient is a whole number, then 3 and 10,554,373.6667 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 | 31,663,121 | |
| -1 | -31,663,121 |
Let's try dividing by 4:
31,663,121 ÷ 4 = 7,915,780.25
If the quotient is a whole number, then 4 and 7,915,780.25 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 | 31,663,121 | |
| -1 | 31,663,121 |
If you did it right, you will end up with this table:
| 1 | 7 | 31 | 79 | 217 | 553 | 1,847 | 2,449 | 12,929 | 17,143 | 57,257 | 145,913 | 400,799 | 1,021,391 | 4,523,303 | 31,663,121 |
| -1 | -7 | -31 | -79 | -217 | -553 | -1,847 | -2,449 | -12,929 | -17,143 | -57,257 | -145,913 | -400,799 | -1,021,391 | -4,523,303 | -31,663,121 |
Here are some more numbers to try:
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