A:
Positive:
1 x 202880455 x 405760943 x 471815197 x 102985215 x 94363479 x 42355985 x 205972395 x 8471
Negative:
-1 x -20288045-5 x -4057609-43 x -471815-197 x -102985-215 x -94363-479 x -42355-985 x -20597-2395 x -8471
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 20,288,045, 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 | 20,288,045 | |
| -1 | -20,288,045 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,288,045.
Example:
1 x 20,288,045 = 20,288,045
and
-1 x -20,288,045 = 20,288,045
Notice both answers equal 20,288,045
With that explanation out of the way, let's continue. Next, we take the number 20,288,045 and divide it by 2:
20,288,045 ÷ 2 = 10,144,022.5
If the quotient is a whole number, then 2 and 10,144,022.5 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 | 20,288,045 | |
| -1 | -20,288,045 |
Now, we try dividing 20,288,045 by 3:
20,288,045 ÷ 3 = 6,762,681.6667
If the quotient is a whole number, then 3 and 6,762,681.6667 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 | 20,288,045 | |
| -1 | -20,288,045 |
Let's try dividing by 4:
20,288,045 ÷ 4 = 5,072,011.25
If the quotient is a whole number, then 4 and 5,072,011.25 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 | 20,288,045 | |
| -1 | 20,288,045 |
If you did it right, you will end up with this table:
| 1 | 5 | 43 | 197 | 215 | 479 | 985 | 2,395 | 8,471 | 20,597 | 42,355 | 94,363 | 102,985 | 471,815 | 4,057,609 | 20,288,045 |
| -1 | -5 | -43 | -197 | -215 | -479 | -985 | -2,395 | -8,471 | -20,597 | -42,355 | -94,363 | -102,985 | -471,815 | -4,057,609 | -20,288,045 |
Here are some more numbers to try:
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