A:
Positive:
1 x 77158855 x 154317729 x 266065127 x 60755145 x 53213419 x 18415635 x 121512095 x 3683
Negative:
-1 x -7715885-5 x -1543177-29 x -266065-127 x -60755-145 x -53213-419 x -18415-635 x -12151-2095 x -3683
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 7,715,885, 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 | 7,715,885 | |
| -1 | -7,715,885 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 7,715,885.
Example:
1 x 7,715,885 = 7,715,885
and
-1 x -7,715,885 = 7,715,885
Notice both answers equal 7,715,885
With that explanation out of the way, let's continue. Next, we take the number 7,715,885 and divide it by 2:
7,715,885 ÷ 2 = 3,857,942.5
If the quotient is a whole number, then 2 and 3,857,942.5 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 | 7,715,885 | |
| -1 | -7,715,885 |
Now, we try dividing 7,715,885 by 3:
7,715,885 ÷ 3 = 2,571,961.6667
If the quotient is a whole number, then 3 and 2,571,961.6667 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 | 7,715,885 | |
| -1 | -7,715,885 |
Let's try dividing by 4:
7,715,885 ÷ 4 = 1,928,971.25
If the quotient is a whole number, then 4 and 1,928,971.25 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 | 7,715,885 | |
| -1 | 7,715,885 |
If you did it right, you will end up with this table:
| 1 | 5 | 29 | 127 | 145 | 419 | 635 | 2,095 | 3,683 | 12,151 | 18,415 | 53,213 | 60,755 | 266,065 | 1,543,177 | 7,715,885 |
| -1 | -5 | -29 | -127 | -145 | -419 | -635 | -2,095 | -3,683 | -12,151 | -18,415 | -53,213 | -60,755 | -266,065 | -1,543,177 | -7,715,885 |
Here are some more numbers to try:
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