A:
Positive:
1 x 203415855 x 406831711 x 184923555 x 369847163 x 124795815 x 249591793 x 113452269 x 8965
Negative:
-1 x -20341585-5 x -4068317-11 x -1849235-55 x -369847-163 x -124795-815 x -24959-1793 x -11345-2269 x -8965
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 20,341,585, 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 | 20,341,585 | |
| -1 | -20,341,585 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,341,585.
Example:
1 x 20,341,585 = 20,341,585
and
-1 x -20,341,585 = 20,341,585
Notice both answers equal 20,341,585
With that explanation out of the way, let's continue. Next, we take the number 20,341,585 and divide it by 2:
20,341,585 ÷ 2 = 10,170,792.5
If the quotient is a whole number, then 2 and 10,170,792.5 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 | 20,341,585 | |
| -1 | -20,341,585 |
Now, we try dividing 20,341,585 by 3:
20,341,585 ÷ 3 = 6,780,528.3333
If the quotient is a whole number, then 3 and 6,780,528.3333 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 | 20,341,585 | |
| -1 | -20,341,585 |
Let's try dividing by 4:
20,341,585 ÷ 4 = 5,085,396.25
If the quotient is a whole number, then 4 and 5,085,396.25 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 | 20,341,585 | |
| -1 | 20,341,585 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 163 | 815 | 1,793 | 2,269 | 8,965 | 11,345 | 24,959 | 124,795 | 369,847 | 1,849,235 | 4,068,317 | 20,341,585 |
| -1 | -5 | -11 | -55 | -163 | -815 | -1,793 | -2,269 | -8,965 | -11,345 | -24,959 | -124,795 | -369,847 | -1,849,235 | -4,068,317 | -20,341,585 |
Here are some more numbers to try:
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