A:
Positive:
1 x 214303755 x 428607525 x 857215125 x 171443173 x 123875865 x 24775991 x 216254325 x 4955
Negative:
-1 x -21430375-5 x -4286075-25 x -857215-125 x -171443-173 x -123875-865 x -24775-991 x -21625-4325 x -4955
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 21,430,375, 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 | 21,430,375 | |
| -1 | -21,430,375 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,430,375.
Example:
1 x 21,430,375 = 21,430,375
and
-1 x -21,430,375 = 21,430,375
Notice both answers equal 21,430,375
With that explanation out of the way, let's continue. Next, we take the number 21,430,375 and divide it by 2:
21,430,375 ÷ 2 = 10,715,187.5
If the quotient is a whole number, then 2 and 10,715,187.5 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 | 21,430,375 | |
| -1 | -21,430,375 |
Now, we try dividing 21,430,375 by 3:
21,430,375 ÷ 3 = 7,143,458.3333
If the quotient is a whole number, then 3 and 7,143,458.3333 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 | 21,430,375 | |
| -1 | -21,430,375 |
Let's try dividing by 4:
21,430,375 ÷ 4 = 5,357,593.75
If the quotient is a whole number, then 4 and 5,357,593.75 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 | 21,430,375 | |
| -1 | 21,430,375 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 125 | 173 | 865 | 991 | 4,325 | 4,955 | 21,625 | 24,775 | 123,875 | 171,443 | 857,215 | 4,286,075 | 21,430,375 |
| -1 | -5 | -25 | -125 | -173 | -865 | -991 | -4,325 | -4,955 | -21,625 | -24,775 | -123,875 | -171,443 | -857,215 | -4,286,075 | -21,430,375 |
Here are some more numbers to try:
Try the factor calculator