A:
Positive:
1 x 200324155 x 400648313 x 154095565 x 308191151 x 132665157 x 127595169 x 118535755 x 26533785 x 25519845 x 237071963 x 102052041 x 9815
Negative:
-1 x -20032415-5 x -4006483-13 x -1540955-65 x -308191-151 x -132665-157 x -127595-169 x -118535-755 x -26533-785 x -25519-845 x -23707-1963 x -10205-2041 x -9815
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 20,032,415, 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 | 20,032,415 | |
| -1 | -20,032,415 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,032,415.
Example:
1 x 20,032,415 = 20,032,415
and
-1 x -20,032,415 = 20,032,415
Notice both answers equal 20,032,415
With that explanation out of the way, let's continue. Next, we take the number 20,032,415 and divide it by 2:
20,032,415 ÷ 2 = 10,016,207.5
If the quotient is a whole number, then 2 and 10,016,207.5 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 | 20,032,415 | |
| -1 | -20,032,415 |
Now, we try dividing 20,032,415 by 3:
20,032,415 ÷ 3 = 6,677,471.6667
If the quotient is a whole number, then 3 and 6,677,471.6667 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 | 20,032,415 | |
| -1 | -20,032,415 |
Let's try dividing by 4:
20,032,415 ÷ 4 = 5,008,103.75
If the quotient is a whole number, then 4 and 5,008,103.75 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 | 20,032,415 | |
| -1 | 20,032,415 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 151 | 157 | 169 | 755 | 785 | 845 | 1,963 | 2,041 | 9,815 | 10,205 | 23,707 | 25,519 | 26,533 | 118,535 | 127,595 | 132,665 | 308,191 | 1,540,955 | 4,006,483 | 20,032,415 |
| -1 | -5 | -13 | -65 | -151 | -157 | -169 | -755 | -785 | -845 | -1,963 | -2,041 | -9,815 | -10,205 | -23,707 | -25,519 | -26,533 | -118,535 | -127,595 | -132,665 | -308,191 | -1,540,955 | -4,006,483 | -20,032,415 |
Here are some more numbers to try:
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