A:
Positive:
1 x 256157755 x 512315525 x 102463141 x 62477567 x 382325205 x 124955335 x 76465373 x 686751025 x 249911675 x 152931865 x 137352747 x 9325
Negative:
-1 x -25615775-5 x -5123155-25 x -1024631-41 x -624775-67 x -382325-205 x -124955-335 x -76465-373 x -68675-1025 x -24991-1675 x -15293-1865 x -13735-2747 x -9325
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 25,615,775, 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 | 25,615,775 | |
| -1 | -25,615,775 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,615,775.
Example:
1 x 25,615,775 = 25,615,775
and
-1 x -25,615,775 = 25,615,775
Notice both answers equal 25,615,775
With that explanation out of the way, let's continue. Next, we take the number 25,615,775 and divide it by 2:
25,615,775 ÷ 2 = 12,807,887.5
If the quotient is a whole number, then 2 and 12,807,887.5 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 | 25,615,775 | |
| -1 | -25,615,775 |
Now, we try dividing 25,615,775 by 3:
25,615,775 ÷ 3 = 8,538,591.6667
If the quotient is a whole number, then 3 and 8,538,591.6667 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 | 25,615,775 | |
| -1 | -25,615,775 |
Let's try dividing by 4:
25,615,775 ÷ 4 = 6,403,943.75
If the quotient is a whole number, then 4 and 6,403,943.75 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 | 25,615,775 | |
| -1 | 25,615,775 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 41 | 67 | 205 | 335 | 373 | 1,025 | 1,675 | 1,865 | 2,747 | 9,325 | 13,735 | 15,293 | 24,991 | 68,675 | 76,465 | 124,955 | 382,325 | 624,775 | 1,024,631 | 5,123,155 | 25,615,775 |
| -1 | -5 | -25 | -41 | -67 | -205 | -335 | -373 | -1,025 | -1,675 | -1,865 | -2,747 | -9,325 | -13,735 | -15,293 | -24,991 | -68,675 | -76,465 | -124,955 | -382,325 | -624,775 | -1,024,631 | -5,123,155 | -25,615,775 |
Here are some more numbers to try:
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