A:
Positive:
1 x 137853855 x 275707717 x 81090585 x 162181157 x 87805785 x 175611033 x 133452669 x 5165
Negative:
-1 x -13785385-5 x -2757077-17 x -810905-85 x -162181-157 x -87805-785 x -17561-1033 x -13345-2669 x -5165
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 13,785,385, 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 | 13,785,385 | |
| -1 | -13,785,385 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 13,785,385.
Example:
1 x 13,785,385 = 13,785,385
and
-1 x -13,785,385 = 13,785,385
Notice both answers equal 13,785,385
With that explanation out of the way, let's continue. Next, we take the number 13,785,385 and divide it by 2:
13,785,385 ÷ 2 = 6,892,692.5
If the quotient is a whole number, then 2 and 6,892,692.5 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 | 13,785,385 | |
| -1 | -13,785,385 |
Now, we try dividing 13,785,385 by 3:
13,785,385 ÷ 3 = 4,595,128.3333
If the quotient is a whole number, then 3 and 4,595,128.3333 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 | 13,785,385 | |
| -1 | -13,785,385 |
Let's try dividing by 4:
13,785,385 ÷ 4 = 3,446,346.25
If the quotient is a whole number, then 4 and 3,446,346.25 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 | 13,785,385 | |
| -1 | 13,785,385 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 85 | 157 | 785 | 1,033 | 2,669 | 5,165 | 13,345 | 17,561 | 87,805 | 162,181 | 810,905 | 2,757,077 | 13,785,385 |
| -1 | -5 | -17 | -85 | -157 | -785 | -1,033 | -2,669 | -5,165 | -13,345 | -17,561 | -87,805 | -162,181 | -810,905 | -2,757,077 | -13,785,385 |
Here are some more numbers to try:
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