A:
Positive:
1 x 2154106255 x 4308212525 x 8616425125 x 1723285523 x 411875625 x 344657659 x 3268752615 x 823753295 x 6537513075 x 16475
Negative:
-1 x -215410625-5 x -43082125-25 x -8616425-125 x -1723285-523 x -411875-625 x -344657-659 x -326875-2615 x -82375-3295 x -65375-13075 x -16475
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 215,410,625, 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 | 215,410,625 | |
| -1 | -215,410,625 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 215,410,625.
Example:
1 x 215,410,625 = 215,410,625
and
-1 x -215,410,625 = 215,410,625
Notice both answers equal 215,410,625
With that explanation out of the way, let's continue. Next, we take the number 215,410,625 and divide it by 2:
215,410,625 ÷ 2 = 107,705,312.5
If the quotient is a whole number, then 2 and 107,705,312.5 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 | 215,410,625 | |
| -1 | -215,410,625 |
Now, we try dividing 215,410,625 by 3:
215,410,625 ÷ 3 = 71,803,541.6667
If the quotient is a whole number, then 3 and 71,803,541.6667 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 | 215,410,625 | |
| -1 | -215,410,625 |
Let's try dividing by 4:
215,410,625 ÷ 4 = 53,852,656.25
If the quotient is a whole number, then 4 and 53,852,656.25 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 | 215,410,625 | |
| -1 | 215,410,625 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 125 | 523 | 625 | 659 | 2,615 | 3,295 | 13,075 | 16,475 | 65,375 | 82,375 | 326,875 | 344,657 | 411,875 | 1,723,285 | 8,616,425 | 43,082,125 | 215,410,625 |
| -1 | -5 | -25 | -125 | -523 | -625 | -659 | -2,615 | -3,295 | -13,075 | -16,475 | -65,375 | -82,375 | -326,875 | -344,657 | -411,875 | -1,723,285 | -8,616,425 | -43,082,125 | -215,410,625 |
Here are some more numbers to try:
Try the factor calculator