A:
Positive:
1 x 215455555 x 430911183 x 259585193 x 111635269 x 80095415 x 51917965 x 223271345 x 16019
Negative:
-1 x -21545555-5 x -4309111-83 x -259585-193 x -111635-269 x -80095-415 x -51917-965 x -22327-1345 x -16019
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 21,545,555, 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 | 21,545,555 | |
| -1 | -21,545,555 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,545,555.
Example:
1 x 21,545,555 = 21,545,555
and
-1 x -21,545,555 = 21,545,555
Notice both answers equal 21,545,555
With that explanation out of the way, let's continue. Next, we take the number 21,545,555 and divide it by 2:
21,545,555 ÷ 2 = 10,772,777.5
If the quotient is a whole number, then 2 and 10,772,777.5 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 | 21,545,555 | |
| -1 | -21,545,555 |
Now, we try dividing 21,545,555 by 3:
21,545,555 ÷ 3 = 7,181,851.6667
If the quotient is a whole number, then 3 and 7,181,851.6667 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 | 21,545,555 | |
| -1 | -21,545,555 |
Let's try dividing by 4:
21,545,555 ÷ 4 = 5,386,388.75
If the quotient is a whole number, then 4 and 5,386,388.75 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 | 21,545,555 | |
| -1 | 21,545,555 |
If you did it right, you will end up with this table:
| 1 | 5 | 83 | 193 | 269 | 415 | 965 | 1,345 | 16,019 | 22,327 | 51,917 | 80,095 | 111,635 | 259,585 | 4,309,111 | 21,545,555 |
| -1 | -5 | -83 | -193 | -269 | -415 | -965 | -1,345 | -16,019 | -22,327 | -51,917 | -80,095 | -111,635 | -259,585 | -4,309,111 | -21,545,555 |
Here are some more numbers to try:
Try the factor calculator