A:
Positive:
1 x 314391355 x 62878277 x 449130513 x 241839535 x 89826149 x 64161565 x 48367991 x 345485245 x 128323455 x 69097637 x 493553185 x 9871
Negative:
-1 x -31439135-5 x -6287827-7 x -4491305-13 x -2418395-35 x -898261-49 x -641615-65 x -483679-91 x -345485-245 x -128323-455 x -69097-637 x -49355-3185 x -9871
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 31,439,135, 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 | 31,439,135 | |
| -1 | -31,439,135 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 31,439,135.
Example:
1 x 31,439,135 = 31,439,135
and
-1 x -31,439,135 = 31,439,135
Notice both answers equal 31,439,135
With that explanation out of the way, let's continue. Next, we take the number 31,439,135 and divide it by 2:
31,439,135 ÷ 2 = 15,719,567.5
If the quotient is a whole number, then 2 and 15,719,567.5 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 | 31,439,135 | |
| -1 | -31,439,135 |
Now, we try dividing 31,439,135 by 3:
31,439,135 ÷ 3 = 10,479,711.6667
If the quotient is a whole number, then 3 and 10,479,711.6667 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 | 31,439,135 | |
| -1 | -31,439,135 |
Let's try dividing by 4:
31,439,135 ÷ 4 = 7,859,783.75
If the quotient is a whole number, then 4 and 7,859,783.75 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 | 31,439,135 | |
| -1 | 31,439,135 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 13 | 35 | 49 | 65 | 91 | 245 | 455 | 637 | 3,185 | 9,871 | 49,355 | 69,097 | 128,323 | 345,485 | 483,679 | 641,615 | 898,261 | 2,418,395 | 4,491,305 | 6,287,827 | 31,439,135 |
| -1 | -5 | -7 | -13 | -35 | -49 | -65 | -91 | -245 | -455 | -637 | -3,185 | -9,871 | -49,355 | -69,097 | -128,323 | -345,485 | -483,679 | -641,615 | -898,261 | -2,418,395 | -4,491,305 | -6,287,827 | -31,439,135 |
Here are some more numbers to try:
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