A:
Positive:
1 x 133977855 x 267955717 x 78810585 x 157621163 x 82195815 x 16439967 x 138552771 x 4835
Negative:
-1 x -13397785-5 x -2679557-17 x -788105-85 x -157621-163 x -82195-815 x -16439-967 x -13855-2771 x -4835
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 13,397,785, 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 | 13,397,785 | |
| -1 | -13,397,785 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 13,397,785.
Example:
1 x 13,397,785 = 13,397,785
and
-1 x -13,397,785 = 13,397,785
Notice both answers equal 13,397,785
With that explanation out of the way, let's continue. Next, we take the number 13,397,785 and divide it by 2:
13,397,785 ÷ 2 = 6,698,892.5
If the quotient is a whole number, then 2 and 6,698,892.5 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 | 13,397,785 | |
| -1 | -13,397,785 |
Now, we try dividing 13,397,785 by 3:
13,397,785 ÷ 3 = 4,465,928.3333
If the quotient is a whole number, then 3 and 4,465,928.3333 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 | 13,397,785 | |
| -1 | -13,397,785 |
Let's try dividing by 4:
13,397,785 ÷ 4 = 3,349,446.25
If the quotient is a whole number, then 4 and 3,349,446.25 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 | 13,397,785 | |
| -1 | 13,397,785 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 85 | 163 | 815 | 967 | 2,771 | 4,835 | 13,855 | 16,439 | 82,195 | 157,621 | 788,105 | 2,679,557 | 13,397,785 |
| -1 | -5 | -17 | -85 | -163 | -815 | -967 | -2,771 | -4,835 | -13,855 | -16,439 | -82,195 | -157,621 | -788,105 | -2,679,557 | -13,397,785 |
Here are some more numbers to try:
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