A:
Positive:
1 x 3921299347 x 83431959 x 66462779 x 496367179 x 2190672773 x 141413713 x 105614661 x 8413
Negative:
-1 x -39212993-47 x -834319-59 x -664627-79 x -496367-179 x -219067-2773 x -14141-3713 x -10561-4661 x -8413
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 39,212,993, 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 | 39,212,993 | |
| -1 | -39,212,993 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 39,212,993.
Example:
1 x 39,212,993 = 39,212,993
and
-1 x -39,212,993 = 39,212,993
Notice both answers equal 39,212,993
With that explanation out of the way, let's continue. Next, we take the number 39,212,993 and divide it by 2:
39,212,993 ÷ 2 = 19,606,496.5
If the quotient is a whole number, then 2 and 19,606,496.5 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 | 39,212,993 | |
| -1 | -39,212,993 |
Now, we try dividing 39,212,993 by 3:
39,212,993 ÷ 3 = 13,070,997.6667
If the quotient is a whole number, then 3 and 13,070,997.6667 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 | 39,212,993 | |
| -1 | -39,212,993 |
Let's try dividing by 4:
39,212,993 ÷ 4 = 9,803,248.25
If the quotient is a whole number, then 4 and 9,803,248.25 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 | 39,212,993 | |
| -1 | 39,212,993 |
If you did it right, you will end up with this table:
| 1 | 47 | 59 | 79 | 179 | 2,773 | 3,713 | 4,661 | 8,413 | 10,561 | 14,141 | 219,067 | 496,367 | 664,627 | 834,319 | 39,212,993 |
| -1 | -47 | -59 | -79 | -179 | -2,773 | -3,713 | -4,661 | -8,413 | -10,561 | -14,141 | -219,067 | -496,367 | -664,627 | -834,319 | -39,212,993 |
Here are some more numbers to try:
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