A:
Positive:
1 x 313155711 x 28468713 x 24088961 x 51337143 x 21899359 x 8723671 x 4667793 x 3949
Negative:
-1 x -3131557-11 x -284687-13 x -240889-61 x -51337-143 x -21899-359 x -8723-671 x -4667-793 x -3949
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 3,131,557, 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 | 3,131,557 | |
| -1 | -3,131,557 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 3,131,557.
Example:
1 x 3,131,557 = 3,131,557
and
-1 x -3,131,557 = 3,131,557
Notice both answers equal 3,131,557
With that explanation out of the way, let's continue. Next, we take the number 3,131,557 and divide it by 2:
3,131,557 ÷ 2 = 1,565,778.5
If the quotient is a whole number, then 2 and 1,565,778.5 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 | 3,131,557 | |
| -1 | -3,131,557 |
Now, we try dividing 3,131,557 by 3:
3,131,557 ÷ 3 = 1,043,852.3333
If the quotient is a whole number, then 3 and 1,043,852.3333 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 | 3,131,557 | |
| -1 | -3,131,557 |
Let's try dividing by 4:
3,131,557 ÷ 4 = 782,889.25
If the quotient is a whole number, then 4 and 782,889.25 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 | 3,131,557 | |
| -1 | 3,131,557 |
If you did it right, you will end up with this table:
| 1 | 11 | 13 | 61 | 143 | 359 | 671 | 793 | 3,949 | 4,667 | 8,723 | 21,899 | 51,337 | 240,889 | 284,687 | 3,131,557 |
| -1 | -11 | -13 | -61 | -143 | -359 | -671 | -793 | -3,949 | -4,667 | -8,723 | -21,899 | -51,337 | -240,889 | -284,687 | -3,131,557 |
Here are some more numbers to try:
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