A:
Positive:
1 x 206173255 x 412346525 x 82469331 x 66507537 x 557225155 x 133015185 x 111445719 x 28675775 x 26603925 x 222891147 x 179753595 x 5735
Negative:
-1 x -20617325-5 x -4123465-25 x -824693-31 x -665075-37 x -557225-155 x -133015-185 x -111445-719 x -28675-775 x -26603-925 x -22289-1147 x -17975-3595 x -5735
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 20,617,325, 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 | 20,617,325 | |
| -1 | -20,617,325 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,617,325.
Example:
1 x 20,617,325 = 20,617,325
and
-1 x -20,617,325 = 20,617,325
Notice both answers equal 20,617,325
With that explanation out of the way, let's continue. Next, we take the number 20,617,325 and divide it by 2:
20,617,325 ÷ 2 = 10,308,662.5
If the quotient is a whole number, then 2 and 10,308,662.5 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 | 20,617,325 | |
| -1 | -20,617,325 |
Now, we try dividing 20,617,325 by 3:
20,617,325 ÷ 3 = 6,872,441.6667
If the quotient is a whole number, then 3 and 6,872,441.6667 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 | 20,617,325 | |
| -1 | -20,617,325 |
Let's try dividing by 4:
20,617,325 ÷ 4 = 5,154,331.25
If the quotient is a whole number, then 4 and 5,154,331.25 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 | 20,617,325 | |
| -1 | 20,617,325 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 31 | 37 | 155 | 185 | 719 | 775 | 925 | 1,147 | 3,595 | 5,735 | 17,975 | 22,289 | 26,603 | 28,675 | 111,445 | 133,015 | 557,225 | 665,075 | 824,693 | 4,123,465 | 20,617,325 |
| -1 | -5 | -25 | -31 | -37 | -155 | -185 | -719 | -775 | -925 | -1,147 | -3,595 | -5,735 | -17,975 | -22,289 | -26,603 | -28,675 | -111,445 | -133,015 | -557,225 | -665,075 | -824,693 | -4,123,465 | -20,617,325 |
Here are some more numbers to try:
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