A:
Positive:
1 x 206317555 x 412635137 x 557615185 x 111523229 x 90095487 x 423651145 x 180192435 x 8473
Negative:
-1 x -20631755-5 x -4126351-37 x -557615-185 x -111523-229 x -90095-487 x -42365-1145 x -18019-2435 x -8473
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 20,631,755, 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 | 20,631,755 | |
| -1 | -20,631,755 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,631,755.
Example:
1 x 20,631,755 = 20,631,755
and
-1 x -20,631,755 = 20,631,755
Notice both answers equal 20,631,755
With that explanation out of the way, let's continue. Next, we take the number 20,631,755 and divide it by 2:
20,631,755 ÷ 2 = 10,315,877.5
If the quotient is a whole number, then 2 and 10,315,877.5 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 | 20,631,755 | |
| -1 | -20,631,755 |
Now, we try dividing 20,631,755 by 3:
20,631,755 ÷ 3 = 6,877,251.6667
If the quotient is a whole number, then 3 and 6,877,251.6667 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 | 20,631,755 | |
| -1 | -20,631,755 |
Let's try dividing by 4:
20,631,755 ÷ 4 = 5,157,938.75
If the quotient is a whole number, then 4 and 5,157,938.75 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 | 20,631,755 | |
| -1 | 20,631,755 |
If you did it right, you will end up with this table:
| 1 | 5 | 37 | 185 | 229 | 487 | 1,145 | 2,435 | 8,473 | 18,019 | 42,365 | 90,095 | 111,523 | 557,615 | 4,126,351 | 20,631,755 |
| -1 | -5 | -37 | -185 | -229 | -487 | -1,145 | -2,435 | -8,473 | -18,019 | -42,365 | -90,095 | -111,523 | -557,615 | -4,126,351 | -20,631,755 |
Here are some more numbers to try:
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