A:
Positive:
1 x 685107855 x 137021577 x 978725535 x 1957451127 x 539455635 x 107891889 x 770654445 x 15413
Negative:
-1 x -68510785-5 x -13702157-7 x -9787255-35 x -1957451-127 x -539455-635 x -107891-889 x -77065-4445 x -15413
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 68,510,785, 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 | 68,510,785 | |
| -1 | -68,510,785 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 68,510,785.
Example:
1 x 68,510,785 = 68,510,785
and
-1 x -68,510,785 = 68,510,785
Notice both answers equal 68,510,785
With that explanation out of the way, let's continue. Next, we take the number 68,510,785 and divide it by 2:
68,510,785 ÷ 2 = 34,255,392.5
If the quotient is a whole number, then 2 and 34,255,392.5 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 | 68,510,785 | |
| -1 | -68,510,785 |
Now, we try dividing 68,510,785 by 3:
68,510,785 ÷ 3 = 22,836,928.3333
If the quotient is a whole number, then 3 and 22,836,928.3333 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 | 68,510,785 | |
| -1 | -68,510,785 |
Let's try dividing by 4:
68,510,785 ÷ 4 = 17,127,696.25
If the quotient is a whole number, then 4 and 17,127,696.25 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 | 68,510,785 | |
| -1 | 68,510,785 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 127 | 635 | 889 | 4,445 | 15,413 | 77,065 | 107,891 | 539,455 | 1,957,451 | 9,787,255 | 13,702,157 | 68,510,785 |
| -1 | -5 | -7 | -35 | -127 | -635 | -889 | -4,445 | -15,413 | -77,065 | -107,891 | -539,455 | -1,957,451 | -9,787,255 | -13,702,157 | -68,510,785 |
Here are some more numbers to try:
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