A:
Positive:
1 x 316156555 x 632313129 x 1090195145 x 218039337 x 93815647 x 488651685 x 187633235 x 9773
Negative:
-1 x -31615655-5 x -6323131-29 x -1090195-145 x -218039-337 x -93815-647 x -48865-1685 x -18763-3235 x -9773
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 31,615,655, 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 | 31,615,655 | |
| -1 | -31,615,655 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 31,615,655.
Example:
1 x 31,615,655 = 31,615,655
and
-1 x -31,615,655 = 31,615,655
Notice both answers equal 31,615,655
With that explanation out of the way, let's continue. Next, we take the number 31,615,655 and divide it by 2:
31,615,655 ÷ 2 = 15,807,827.5
If the quotient is a whole number, then 2 and 15,807,827.5 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 | 31,615,655 | |
| -1 | -31,615,655 |
Now, we try dividing 31,615,655 by 3:
31,615,655 ÷ 3 = 10,538,551.6667
If the quotient is a whole number, then 3 and 10,538,551.6667 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 | 31,615,655 | |
| -1 | -31,615,655 |
Let's try dividing by 4:
31,615,655 ÷ 4 = 7,903,913.75
If the quotient is a whole number, then 4 and 7,903,913.75 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 | 31,615,655 | |
| -1 | 31,615,655 |
If you did it right, you will end up with this table:
| 1 | 5 | 29 | 145 | 337 | 647 | 1,685 | 3,235 | 9,773 | 18,763 | 48,865 | 93,815 | 218,039 | 1,090,195 | 6,323,131 | 31,615,655 |
| -1 | -5 | -29 | -145 | -337 | -647 | -1,685 | -3,235 | -9,773 | -18,763 | -48,865 | -93,815 | -218,039 | -1,090,195 | -6,323,131 | -31,615,655 |
Here are some more numbers to try:
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