A:
Positive:
1 x 208043455 x 416086917 x 122378585 x 244757311 x 66895787 x 264351555 x 133793935 x 5287
Negative:
-1 x -20804345-5 x -4160869-17 x -1223785-85 x -244757-311 x -66895-787 x -26435-1555 x -13379-3935 x -5287
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 20,804,345, 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 | 20,804,345 | |
| -1 | -20,804,345 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,804,345.
Example:
1 x 20,804,345 = 20,804,345
and
-1 x -20,804,345 = 20,804,345
Notice both answers equal 20,804,345
With that explanation out of the way, let's continue. Next, we take the number 20,804,345 and divide it by 2:
20,804,345 ÷ 2 = 10,402,172.5
If the quotient is a whole number, then 2 and 10,402,172.5 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 | 20,804,345 | |
| -1 | -20,804,345 |
Now, we try dividing 20,804,345 by 3:
20,804,345 ÷ 3 = 6,934,781.6667
If the quotient is a whole number, then 3 and 6,934,781.6667 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 | 20,804,345 | |
| -1 | -20,804,345 |
Let's try dividing by 4:
20,804,345 ÷ 4 = 5,201,086.25
If the quotient is a whole number, then 4 and 5,201,086.25 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 | 20,804,345 | |
| -1 | 20,804,345 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 85 | 311 | 787 | 1,555 | 3,935 | 5,287 | 13,379 | 26,435 | 66,895 | 244,757 | 1,223,785 | 4,160,869 | 20,804,345 |
| -1 | -5 | -17 | -85 | -311 | -787 | -1,555 | -3,935 | -5,287 | -13,379 | -26,435 | -66,895 | -244,757 | -1,223,785 | -4,160,869 | -20,804,345 |
Here are some more numbers to try:
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