A:
Positive:
1 x 215507055 x 431014111 x 195915555 x 391831121 x 178105179 x 120395199 x 108295605 x 35621895 x 24079995 x 216591969 x 109452189 x 9845
Negative:
-1 x -21550705-5 x -4310141-11 x -1959155-55 x -391831-121 x -178105-179 x -120395-199 x -108295-605 x -35621-895 x -24079-995 x -21659-1969 x -10945-2189 x -9845
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 21,550,705, 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 | 21,550,705 | |
| -1 | -21,550,705 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,550,705.
Example:
1 x 21,550,705 = 21,550,705
and
-1 x -21,550,705 = 21,550,705
Notice both answers equal 21,550,705
With that explanation out of the way, let's continue. Next, we take the number 21,550,705 and divide it by 2:
21,550,705 ÷ 2 = 10,775,352.5
If the quotient is a whole number, then 2 and 10,775,352.5 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 | 21,550,705 | |
| -1 | -21,550,705 |
Now, we try dividing 21,550,705 by 3:
21,550,705 ÷ 3 = 7,183,568.3333
If the quotient is a whole number, then 3 and 7,183,568.3333 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 | 21,550,705 | |
| -1 | -21,550,705 |
Let's try dividing by 4:
21,550,705 ÷ 4 = 5,387,676.25
If the quotient is a whole number, then 4 and 5,387,676.25 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 | 21,550,705 | |
| -1 | 21,550,705 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 121 | 179 | 199 | 605 | 895 | 995 | 1,969 | 2,189 | 9,845 | 10,945 | 21,659 | 24,079 | 35,621 | 108,295 | 120,395 | 178,105 | 391,831 | 1,959,155 | 4,310,141 | 21,550,705 |
| -1 | -5 | -11 | -55 | -121 | -179 | -199 | -605 | -895 | -995 | -1,969 | -2,189 | -9,845 | -10,945 | -21,659 | -24,079 | -35,621 | -108,295 | -120,395 | -178,105 | -391,831 | -1,959,155 | -4,310,141 | -21,550,705 |
Here are some more numbers to try:
Try the factor calculator