A:
Positive:
1 x 207412755 x 414825517 x 122007525 x 82965137 x 56057585 x 244015185 x 112115425 x 48803629 x 32975925 x 224231319 x 157253145 x 6595
Negative:
-1 x -20741275-5 x -4148255-17 x -1220075-25 x -829651-37 x -560575-85 x -244015-185 x -112115-425 x -48803-629 x -32975-925 x -22423-1319 x -15725-3145 x -6595
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 20,741,275, 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 | 20,741,275 | |
| -1 | -20,741,275 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,741,275.
Example:
1 x 20,741,275 = 20,741,275
and
-1 x -20,741,275 = 20,741,275
Notice both answers equal 20,741,275
With that explanation out of the way, let's continue. Next, we take the number 20,741,275 and divide it by 2:
20,741,275 ÷ 2 = 10,370,637.5
If the quotient is a whole number, then 2 and 10,370,637.5 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 | 20,741,275 | |
| -1 | -20,741,275 |
Now, we try dividing 20,741,275 by 3:
20,741,275 ÷ 3 = 6,913,758.3333
If the quotient is a whole number, then 3 and 6,913,758.3333 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 | 20,741,275 | |
| -1 | -20,741,275 |
Let's try dividing by 4:
20,741,275 ÷ 4 = 5,185,318.75
If the quotient is a whole number, then 4 and 5,185,318.75 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 | 20,741,275 | |
| -1 | 20,741,275 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 25 | 37 | 85 | 185 | 425 | 629 | 925 | 1,319 | 3,145 | 6,595 | 15,725 | 22,423 | 32,975 | 48,803 | 112,115 | 244,015 | 560,575 | 829,651 | 1,220,075 | 4,148,255 | 20,741,275 |
| -1 | -5 | -17 | -25 | -37 | -85 | -185 | -425 | -629 | -925 | -1,319 | -3,145 | -6,595 | -15,725 | -22,423 | -32,975 | -48,803 | -112,115 | -244,015 | -560,575 | -829,651 | -1,220,075 | -4,148,255 | -20,741,275 |
Here are some more numbers to try:
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