A:
Positive:
1 x 5757072113 x 442851717 x 3386513221 x 260501337 x 170833773 x 744774381 x 131415729 x 10049
Negative:
-1 x -57570721-13 x -4428517-17 x -3386513-221 x -260501-337 x -170833-773 x -74477-4381 x -13141-5729 x -10049
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 57,570,721, 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 | 57,570,721 | |
| -1 | -57,570,721 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 57,570,721.
Example:
1 x 57,570,721 = 57,570,721
and
-1 x -57,570,721 = 57,570,721
Notice both answers equal 57,570,721
With that explanation out of the way, let's continue. Next, we take the number 57,570,721 and divide it by 2:
57,570,721 ÷ 2 = 28,785,360.5
If the quotient is a whole number, then 2 and 28,785,360.5 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 | 57,570,721 | |
| -1 | -57,570,721 |
Now, we try dividing 57,570,721 by 3:
57,570,721 ÷ 3 = 19,190,240.3333
If the quotient is a whole number, then 3 and 19,190,240.3333 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 | 57,570,721 | |
| -1 | -57,570,721 |
Let's try dividing by 4:
57,570,721 ÷ 4 = 14,392,680.25
If the quotient is a whole number, then 4 and 14,392,680.25 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 | 57,570,721 | |
| -1 | 57,570,721 |
If you did it right, you will end up with this table:
| 1 | 13 | 17 | 221 | 337 | 773 | 4,381 | 5,729 | 10,049 | 13,141 | 74,477 | 170,833 | 260,501 | 3,386,513 | 4,428,517 | 57,570,721 |
| -1 | -13 | -17 | -221 | -337 | -773 | -4,381 | -5,729 | -10,049 | -13,141 | -74,477 | -170,833 | -260,501 | -3,386,513 | -4,428,517 | -57,570,721 |
Here are some more numbers to try:
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