A:
Positive:
1 x 207272455 x 41454497 x 296103511 x 188429535 x 59220749 x 42300555 x 37685977 x 269185245 x 84601385 x 53837539 x 384552695 x 7691
Negative:
-1 x -20727245-5 x -4145449-7 x -2961035-11 x -1884295-35 x -592207-49 x -423005-55 x -376859-77 x -269185-245 x -84601-385 x -53837-539 x -38455-2695 x -7691
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 20,727,245, 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 | 20,727,245 | |
| -1 | -20,727,245 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,727,245.
Example:
1 x 20,727,245 = 20,727,245
and
-1 x -20,727,245 = 20,727,245
Notice both answers equal 20,727,245
With that explanation out of the way, let's continue. Next, we take the number 20,727,245 and divide it by 2:
20,727,245 ÷ 2 = 10,363,622.5
If the quotient is a whole number, then 2 and 10,363,622.5 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 | 20,727,245 | |
| -1 | -20,727,245 |
Now, we try dividing 20,727,245 by 3:
20,727,245 ÷ 3 = 6,909,081.6667
If the quotient is a whole number, then 3 and 6,909,081.6667 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 | 20,727,245 | |
| -1 | -20,727,245 |
Let's try dividing by 4:
20,727,245 ÷ 4 = 5,181,811.25
If the quotient is a whole number, then 4 and 5,181,811.25 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 | 20,727,245 | |
| -1 | 20,727,245 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 11 | 35 | 49 | 55 | 77 | 245 | 385 | 539 | 2,695 | 7,691 | 38,455 | 53,837 | 84,601 | 269,185 | 376,859 | 423,005 | 592,207 | 1,884,295 | 2,961,035 | 4,145,449 | 20,727,245 |
| -1 | -5 | -7 | -11 | -35 | -49 | -55 | -77 | -245 | -385 | -539 | -2,695 | -7,691 | -38,455 | -53,837 | -84,601 | -269,185 | -376,859 | -423,005 | -592,207 | -1,884,295 | -2,961,035 | -4,145,449 | -20,727,245 |
Here are some more numbers to try:
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