A:
Positive:
1 x 31078455 x 62156913 x 23906565 x 47813137 x 22685349 x 8905685 x 45371745 x 1781
Negative:
-1 x -3107845-5 x -621569-13 x -239065-65 x -47813-137 x -22685-349 x -8905-685 x -4537-1745 x -1781
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 3,107,845, 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 | 3,107,845 | |
| -1 | -3,107,845 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 3,107,845.
Example:
1 x 3,107,845 = 3,107,845
and
-1 x -3,107,845 = 3,107,845
Notice both answers equal 3,107,845
With that explanation out of the way, let's continue. Next, we take the number 3,107,845 and divide it by 2:
3,107,845 ÷ 2 = 1,553,922.5
If the quotient is a whole number, then 2 and 1,553,922.5 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 | 3,107,845 | |
| -1 | -3,107,845 |
Now, we try dividing 3,107,845 by 3:
3,107,845 ÷ 3 = 1,035,948.3333
If the quotient is a whole number, then 3 and 1,035,948.3333 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 | 3,107,845 | |
| -1 | -3,107,845 |
Let's try dividing by 4:
3,107,845 ÷ 4 = 776,961.25
If the quotient is a whole number, then 4 and 776,961.25 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 | 3,107,845 | |
| -1 | 3,107,845 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 137 | 349 | 685 | 1,745 | 1,781 | 4,537 | 8,905 | 22,685 | 47,813 | 239,065 | 621,569 | 3,107,845 |
| -1 | -5 | -13 | -65 | -137 | -349 | -685 | -1,745 | -1,781 | -4,537 | -8,905 | -22,685 | -47,813 | -239,065 | -621,569 | -3,107,845 |
Here are some more numbers to try:
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