A:
Positive:
1 x 79391055 x 158782179 x 100495101 x 78605199 x 39895395 x 20099505 x 15721995 x 7979
Negative:
-1 x -7939105-5 x -1587821-79 x -100495-101 x -78605-199 x -39895-395 x -20099-505 x -15721-995 x -7979
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 7,939,105, 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 | 7,939,105 | |
| -1 | -7,939,105 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,939,105.
Example:
1 x 7,939,105 = 7,939,105
and
-1 x -7,939,105 = 7,939,105
Notice both answers equal 7,939,105
With that explanation out of the way, let's continue. Next, we take the number 7,939,105 and divide it by 2:
7,939,105 ÷ 2 = 3,969,552.5
If the quotient is a whole number, then 2 and 3,969,552.5 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 | 7,939,105 | |
| -1 | -7,939,105 |
Now, we try dividing 7,939,105 by 3:
7,939,105 ÷ 3 = 2,646,368.3333
If the quotient is a whole number, then 3 and 2,646,368.3333 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 | 7,939,105 | |
| -1 | -7,939,105 |
Let's try dividing by 4:
7,939,105 ÷ 4 = 1,984,776.25
If the quotient is a whole number, then 4 and 1,984,776.25 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 | 7,939,105 | |
| -1 | 7,939,105 |
If you did it right, you will end up with this table:
| 1 | 5 | 79 | 101 | 199 | 395 | 505 | 995 | 7,979 | 15,721 | 20,099 | 39,895 | 78,605 | 100,495 | 1,587,821 | 7,939,105 |
| -1 | -5 | -79 | -101 | -199 | -395 | -505 | -995 | -7,979 | -15,721 | -20,099 | -39,895 | -78,605 | -100,495 | -1,587,821 | -7,939,105 |
Here are some more numbers to try:
Try the factor calculator