A:
Positive:
1 x 203825755 x 407651517 x 119897525 x 81530385 x 239795199 x 102425241 x 84575425 x 47959995 x 204851205 x 169153383 x 60254097 x 4975
Negative:
-1 x -20382575-5 x -4076515-17 x -1198975-25 x -815303-85 x -239795-199 x -102425-241 x -84575-425 x -47959-995 x -20485-1205 x -16915-3383 x -6025-4097 x -4975
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 20,382,575, 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 | 20,382,575 | |
| -1 | -20,382,575 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,382,575.
Example:
1 x 20,382,575 = 20,382,575
and
-1 x -20,382,575 = 20,382,575
Notice both answers equal 20,382,575
With that explanation out of the way, let's continue. Next, we take the number 20,382,575 and divide it by 2:
20,382,575 ÷ 2 = 10,191,287.5
If the quotient is a whole number, then 2 and 10,191,287.5 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 | 20,382,575 | |
| -1 | -20,382,575 |
Now, we try dividing 20,382,575 by 3:
20,382,575 ÷ 3 = 6,794,191.6667
If the quotient is a whole number, then 3 and 6,794,191.6667 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 | 20,382,575 | |
| -1 | -20,382,575 |
Let's try dividing by 4:
20,382,575 ÷ 4 = 5,095,643.75
If the quotient is a whole number, then 4 and 5,095,643.75 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 | 20,382,575 | |
| -1 | 20,382,575 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 25 | 85 | 199 | 241 | 425 | 995 | 1,205 | 3,383 | 4,097 | 4,975 | 6,025 | 16,915 | 20,485 | 47,959 | 84,575 | 102,425 | 239,795 | 815,303 | 1,198,975 | 4,076,515 | 20,382,575 |
| -1 | -5 | -17 | -25 | -85 | -199 | -241 | -425 | -995 | -1,205 | -3,383 | -4,097 | -4,975 | -6,025 | -16,915 | -20,485 | -47,959 | -84,575 | -102,425 | -239,795 | -815,303 | -1,198,975 | -4,076,515 | -20,382,575 |
Here are some more numbers to try:
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