A:
Positive:
1 x 215426055 x 43085217 x 307751523 x 93663535 x 61550349 x 439645115 x 187327161 x 133805245 x 87929805 x 267611127 x 191153823 x 5635
Negative:
-1 x -21542605-5 x -4308521-7 x -3077515-23 x -936635-35 x -615503-49 x -439645-115 x -187327-161 x -133805-245 x -87929-805 x -26761-1127 x -19115-3823 x -5635
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 21,542,605, 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 | 21,542,605 | |
| -1 | -21,542,605 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,542,605.
Example:
1 x 21,542,605 = 21,542,605
and
-1 x -21,542,605 = 21,542,605
Notice both answers equal 21,542,605
With that explanation out of the way, let's continue. Next, we take the number 21,542,605 and divide it by 2:
21,542,605 ÷ 2 = 10,771,302.5
If the quotient is a whole number, then 2 and 10,771,302.5 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 | 21,542,605 | |
| -1 | -21,542,605 |
Now, we try dividing 21,542,605 by 3:
21,542,605 ÷ 3 = 7,180,868.3333
If the quotient is a whole number, then 3 and 7,180,868.3333 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 | 21,542,605 | |
| -1 | -21,542,605 |
Let's try dividing by 4:
21,542,605 ÷ 4 = 5,385,651.25
If the quotient is a whole number, then 4 and 5,385,651.25 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 | 21,542,605 | |
| -1 | 21,542,605 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 23 | 35 | 49 | 115 | 161 | 245 | 805 | 1,127 | 3,823 | 5,635 | 19,115 | 26,761 | 87,929 | 133,805 | 187,327 | 439,645 | 615,503 | 936,635 | 3,077,515 | 4,308,521 | 21,542,605 |
| -1 | -5 | -7 | -23 | -35 | -49 | -115 | -161 | -245 | -805 | -1,127 | -3,823 | -5,635 | -19,115 | -26,761 | -87,929 | -133,805 | -187,327 | -439,645 | -615,503 | -936,635 | -3,077,515 | -4,308,521 | -21,542,605 |
Here are some more numbers to try:
Try the factor calculator