A:
Positive:
1 x 202473655 x 404947329 x 69818547 x 430795145 x 139637235 x 861591363 x 148552971 x 6815
Negative:
-1 x -20247365-5 x -4049473-29 x -698185-47 x -430795-145 x -139637-235 x -86159-1363 x -14855-2971 x -6815
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 20,247,365, 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 | 20,247,365 | |
| -1 | -20,247,365 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,247,365.
Example:
1 x 20,247,365 = 20,247,365
and
-1 x -20,247,365 = 20,247,365
Notice both answers equal 20,247,365
With that explanation out of the way, let's continue. Next, we take the number 20,247,365 and divide it by 2:
20,247,365 ÷ 2 = 10,123,682.5
If the quotient is a whole number, then 2 and 10,123,682.5 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 | 20,247,365 | |
| -1 | -20,247,365 |
Now, we try dividing 20,247,365 by 3:
20,247,365 ÷ 3 = 6,749,121.6667
If the quotient is a whole number, then 3 and 6,749,121.6667 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 | 20,247,365 | |
| -1 | -20,247,365 |
Let's try dividing by 4:
20,247,365 ÷ 4 = 5,061,841.25
If the quotient is a whole number, then 4 and 5,061,841.25 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 | 20,247,365 | |
| -1 | 20,247,365 |
If you did it right, you will end up with this table:
| 1 | 5 | 29 | 47 | 145 | 235 | 1,363 | 2,971 | 6,815 | 14,855 | 86,159 | 139,637 | 430,795 | 698,185 | 4,049,473 | 20,247,365 |
| -1 | -5 | -29 | -47 | -145 | -235 | -1,363 | -2,971 | -6,815 | -14,855 | -86,159 | -139,637 | -430,795 | -698,185 | -4,049,473 | -20,247,365 |
Here are some more numbers to try:
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