A:
Positive:
1 x 2566525717 x 150972119 x 1350803181 x 141797323 x 79459439 x 584633077 x 83413439 x 7463
Negative:
-1 x -25665257-17 x -1509721-19 x -1350803-181 x -141797-323 x -79459-439 x -58463-3077 x -8341-3439 x -7463
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 25,665,257, 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 | 25,665,257 | |
| -1 | -25,665,257 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,665,257.
Example:
1 x 25,665,257 = 25,665,257
and
-1 x -25,665,257 = 25,665,257
Notice both answers equal 25,665,257
With that explanation out of the way, let's continue. Next, we take the number 25,665,257 and divide it by 2:
25,665,257 ÷ 2 = 12,832,628.5
If the quotient is a whole number, then 2 and 12,832,628.5 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 | 25,665,257 | |
| -1 | -25,665,257 |
Now, we try dividing 25,665,257 by 3:
25,665,257 ÷ 3 = 8,555,085.6667
If the quotient is a whole number, then 3 and 8,555,085.6667 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 | 25,665,257 | |
| -1 | -25,665,257 |
Let's try dividing by 4:
25,665,257 ÷ 4 = 6,416,314.25
If the quotient is a whole number, then 4 and 6,416,314.25 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 | 25,665,257 | |
| -1 | 25,665,257 |
If you did it right, you will end up with this table:
| 1 | 17 | 19 | 181 | 323 | 439 | 3,077 | 3,439 | 7,463 | 8,341 | 58,463 | 79,459 | 141,797 | 1,350,803 | 1,509,721 | 25,665,257 |
| -1 | -17 | -19 | -181 | -323 | -439 | -3,077 | -3,439 | -7,463 | -8,341 | -58,463 | -79,459 | -141,797 | -1,350,803 | -1,509,721 | -25,665,257 |
Here are some more numbers to try:
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