A:
Positive:
1 x 256901655 x 513803331 x 828715107 x 240095155 x 165743535 x 480191549 x 165853317 x 7745
Negative:
-1 x -25690165-5 x -5138033-31 x -828715-107 x -240095-155 x -165743-535 x -48019-1549 x -16585-3317 x -7745
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 25,690,165, 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 | 25,690,165 | |
| -1 | -25,690,165 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,690,165.
Example:
1 x 25,690,165 = 25,690,165
and
-1 x -25,690,165 = 25,690,165
Notice both answers equal 25,690,165
With that explanation out of the way, let's continue. Next, we take the number 25,690,165 and divide it by 2:
25,690,165 ÷ 2 = 12,845,082.5
If the quotient is a whole number, then 2 and 12,845,082.5 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 | 25,690,165 | |
| -1 | -25,690,165 |
Now, we try dividing 25,690,165 by 3:
25,690,165 ÷ 3 = 8,563,388.3333
If the quotient is a whole number, then 3 and 8,563,388.3333 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 | 25,690,165 | |
| -1 | -25,690,165 |
Let's try dividing by 4:
25,690,165 ÷ 4 = 6,422,541.25
If the quotient is a whole number, then 4 and 6,422,541.25 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 | 25,690,165 | |
| -1 | 25,690,165 |
If you did it right, you will end up with this table:
| 1 | 5 | 31 | 107 | 155 | 535 | 1,549 | 3,317 | 7,745 | 16,585 | 48,019 | 165,743 | 240,095 | 828,715 | 5,138,033 | 25,690,165 |
| -1 | -5 | -31 | -107 | -155 | -535 | -1,549 | -3,317 | -7,745 | -16,585 | -48,019 | -165,743 | -240,095 | -828,715 | -5,138,033 | -25,690,165 |
Here are some more numbers to try:
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