A:
Positive:
1 x 39918555 x 7983717 x 57026517 x 23481535 x 11405385 x 46963119 x 33545595 x 6709
Negative:
-1 x -3991855-5 x -798371-7 x -570265-17 x -234815-35 x -114053-85 x -46963-119 x -33545-595 x -6709
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 3,991,855, 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 | 3,991,855 | |
| -1 | -3,991,855 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 3,991,855.
Example:
1 x 3,991,855 = 3,991,855
and
-1 x -3,991,855 = 3,991,855
Notice both answers equal 3,991,855
With that explanation out of the way, let's continue. Next, we take the number 3,991,855 and divide it by 2:
3,991,855 ÷ 2 = 1,995,927.5
If the quotient is a whole number, then 2 and 1,995,927.5 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 | 3,991,855 | |
| -1 | -3,991,855 |
Now, we try dividing 3,991,855 by 3:
3,991,855 ÷ 3 = 1,330,618.3333
If the quotient is a whole number, then 3 and 1,330,618.3333 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 | 3,991,855 | |
| -1 | -3,991,855 |
Let's try dividing by 4:
3,991,855 ÷ 4 = 997,963.75
If the quotient is a whole number, then 4 and 997,963.75 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 | 3,991,855 | |
| -1 | 3,991,855 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 17 | 35 | 85 | 119 | 595 | 6,709 | 33,545 | 46,963 | 114,053 | 234,815 | 570,265 | 798,371 | 3,991,855 |
| -1 | -5 | -7 | -17 | -35 | -85 | -119 | -595 | -6,709 | -33,545 | -46,963 | -114,053 | -234,815 | -570,265 | -798,371 | -3,991,855 |
Here are some more numbers to try:
Try the factor calculator