A:
Positive:
1 x 3310412217 x 4729160317 x 19473013119 x 2781859683 x 4846874073 x 812774781 x 6924111611 x 28511
Negative:
-1 x -331041221-7 x -47291603-17 x -19473013-119 x -2781859-683 x -484687-4073 x -81277-4781 x -69241-11611 x -28511
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 331,041,221, 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 | 331,041,221 | |
| -1 | -331,041,221 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 331,041,221.
Example:
1 x 331,041,221 = 331,041,221
and
-1 x -331,041,221 = 331,041,221
Notice both answers equal 331,041,221
With that explanation out of the way, let's continue. Next, we take the number 331,041,221 and divide it by 2:
331,041,221 ÷ 2 = 165,520,610.5
If the quotient is a whole number, then 2 and 165,520,610.5 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 | 331,041,221 | |
| -1 | -331,041,221 |
Now, we try dividing 331,041,221 by 3:
331,041,221 ÷ 3 = 110,347,073.6667
If the quotient is a whole number, then 3 and 110,347,073.6667 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 | 331,041,221 | |
| -1 | -331,041,221 |
Let's try dividing by 4:
331,041,221 ÷ 4 = 82,760,305.25
If the quotient is a whole number, then 4 and 82,760,305.25 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 | 331,041,221 | |
| -1 | 331,041,221 |
If you did it right, you will end up with this table:
| 1 | 7 | 17 | 119 | 683 | 4,073 | 4,781 | 11,611 | 28,511 | 69,241 | 81,277 | 484,687 | 2,781,859 | 19,473,013 | 47,291,603 | 331,041,221 |
| -1 | -7 | -17 | -119 | -683 | -4,073 | -4,781 | -11,611 | -28,511 | -69,241 | -81,277 | -484,687 | -2,781,859 | -19,473,013 | -47,291,603 | -331,041,221 |
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