A:
Positive:
1 x 2071641129 x 71435937 x 55990343 x 481777449 x 461391073 x 193071247 x 166131591 x 13021
Negative:
-1 x -20716411-29 x -714359-37 x -559903-43 x -481777-449 x -46139-1073 x -19307-1247 x -16613-1591 x -13021
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 20,716,411, 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 | 20,716,411 | |
| -1 | -20,716,411 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,716,411.
Example:
1 x 20,716,411 = 20,716,411
and
-1 x -20,716,411 = 20,716,411
Notice both answers equal 20,716,411
With that explanation out of the way, let's continue. Next, we take the number 20,716,411 and divide it by 2:
20,716,411 ÷ 2 = 10,358,205.5
If the quotient is a whole number, then 2 and 10,358,205.5 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 | 20,716,411 | |
| -1 | -20,716,411 |
Now, we try dividing 20,716,411 by 3:
20,716,411 ÷ 3 = 6,905,470.3333
If the quotient is a whole number, then 3 and 6,905,470.3333 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 | 20,716,411 | |
| -1 | -20,716,411 |
Let's try dividing by 4:
20,716,411 ÷ 4 = 5,179,102.75
If the quotient is a whole number, then 4 and 5,179,102.75 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 | 20,716,411 | |
| -1 | 20,716,411 |
If you did it right, you will end up with this table:
| 1 | 29 | 37 | 43 | 449 | 1,073 | 1,247 | 1,591 | 13,021 | 16,613 | 19,307 | 46,139 | 481,777 | 559,903 | 714,359 | 20,716,411 |
| -1 | -29 | -37 | -43 | -449 | -1,073 | -1,247 | -1,591 | -13,021 | -16,613 | -19,307 | -46,139 | -481,777 | -559,903 | -714,359 | -20,716,411 |
Here are some more numbers to try:
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