A:
Positive:
1 x 214043755 x 428087523 x 93062525 x 856175115 x 186125125 x 171235575 x 37225625 x 342471489 x 143752875 x 7445
Negative:
-1 x -21404375-5 x -4280875-23 x -930625-25 x -856175-115 x -186125-125 x -171235-575 x -37225-625 x -34247-1489 x -14375-2875 x -7445
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 21,404,375, 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 | 21,404,375 | |
| -1 | -21,404,375 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 21,404,375.
Example:
1 x 21,404,375 = 21,404,375
and
-1 x -21,404,375 = 21,404,375
Notice both answers equal 21,404,375
With that explanation out of the way, let's continue. Next, we take the number 21,404,375 and divide it by 2:
21,404,375 ÷ 2 = 10,702,187.5
If the quotient is a whole number, then 2 and 10,702,187.5 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 | 21,404,375 | |
| -1 | -21,404,375 |
Now, we try dividing 21,404,375 by 3:
21,404,375 ÷ 3 = 7,134,791.6667
If the quotient is a whole number, then 3 and 7,134,791.6667 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 | 21,404,375 | |
| -1 | -21,404,375 |
Let's try dividing by 4:
21,404,375 ÷ 4 = 5,351,093.75
If the quotient is a whole number, then 4 and 5,351,093.75 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 | 21,404,375 | |
| -1 | 21,404,375 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 25 | 115 | 125 | 575 | 625 | 1,489 | 2,875 | 7,445 | 14,375 | 34,247 | 37,225 | 171,235 | 186,125 | 856,175 | 930,625 | 4,280,875 | 21,404,375 |
| -1 | -5 | -23 | -25 | -115 | -125 | -575 | -625 | -1,489 | -2,875 | -7,445 | -14,375 | -34,247 | -37,225 | -171,235 | -186,125 | -856,175 | -930,625 | -4,280,875 | -21,404,375 |
Here are some more numbers to try:
Try the factor calculator