A:
Positive:
1 x 205045155 x 410090319 x 107918595 x 215837101 x 203015505 x 406031919 x 106852137 x 9595
Negative:
-1 x -20504515-5 x -4100903-19 x -1079185-95 x -215837-101 x -203015-505 x -40603-1919 x -10685-2137 x -9595
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 20,504,515, 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 | 20,504,515 | |
| -1 | -20,504,515 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,504,515.
Example:
1 x 20,504,515 = 20,504,515
and
-1 x -20,504,515 = 20,504,515
Notice both answers equal 20,504,515
With that explanation out of the way, let's continue. Next, we take the number 20,504,515 and divide it by 2:
20,504,515 ÷ 2 = 10,252,257.5
If the quotient is a whole number, then 2 and 10,252,257.5 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 | 20,504,515 | |
| -1 | -20,504,515 |
Now, we try dividing 20,504,515 by 3:
20,504,515 ÷ 3 = 6,834,838.3333
If the quotient is a whole number, then 3 and 6,834,838.3333 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 | 20,504,515 | |
| -1 | -20,504,515 |
Let's try dividing by 4:
20,504,515 ÷ 4 = 5,126,128.75
If the quotient is a whole number, then 4 and 5,126,128.75 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 | 20,504,515 | |
| -1 | 20,504,515 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 95 | 101 | 505 | 1,919 | 2,137 | 9,595 | 10,685 | 40,603 | 203,015 | 215,837 | 1,079,185 | 4,100,903 | 20,504,515 |
| -1 | -5 | -19 | -95 | -101 | -505 | -1,919 | -2,137 | -9,595 | -10,685 | -40,603 | -203,015 | -215,837 | -1,079,185 | -4,100,903 | -20,504,515 |
Here are some more numbers to try:
Try the factor calculator