A:
Positive:
1 x 208018755 x 416037525 x 83207583 x 250625125 x 166415401 x 51875415 x 50125625 x 332832005 x 103752075 x 10025
Negative:
-1 x -20801875-5 x -4160375-25 x -832075-83 x -250625-125 x -166415-401 x -51875-415 x -50125-625 x -33283-2005 x -10375-2075 x -10025
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 20,801,875, 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 | 20,801,875 | |
| -1 | -20,801,875 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,801,875.
Example:
1 x 20,801,875 = 20,801,875
and
-1 x -20,801,875 = 20,801,875
Notice both answers equal 20,801,875
With that explanation out of the way, let's continue. Next, we take the number 20,801,875 and divide it by 2:
20,801,875 ÷ 2 = 10,400,937.5
If the quotient is a whole number, then 2 and 10,400,937.5 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 | 20,801,875 | |
| -1 | -20,801,875 |
Now, we try dividing 20,801,875 by 3:
20,801,875 ÷ 3 = 6,933,958.3333
If the quotient is a whole number, then 3 and 6,933,958.3333 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 | 20,801,875 | |
| -1 | -20,801,875 |
Let's try dividing by 4:
20,801,875 ÷ 4 = 5,200,468.75
If the quotient is a whole number, then 4 and 5,200,468.75 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 | 20,801,875 | |
| -1 | 20,801,875 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 83 | 125 | 401 | 415 | 625 | 2,005 | 2,075 | 10,025 | 10,375 | 33,283 | 50,125 | 51,875 | 166,415 | 250,625 | 832,075 | 4,160,375 | 20,801,875 |
| -1 | -5 | -25 | -83 | -125 | -401 | -415 | -625 | -2,005 | -2,075 | -10,025 | -10,375 | -33,283 | -50,125 | -51,875 | -166,415 | -250,625 | -832,075 | -4,160,375 | -20,801,875 |
Here are some more numbers to try:
Try the factor calculator