A:
Positive:
1 x 255575117 x 365107317 x 1503383119 x 214769293 x 87227733 x 348672051 x 124614981 x 5131
Negative:
-1 x -25557511-7 x -3651073-17 x -1503383-119 x -214769-293 x -87227-733 x -34867-2051 x -12461-4981 x -5131
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 25,557,511, 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 | 25,557,511 | |
| -1 | -25,557,511 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,557,511.
Example:
1 x 25,557,511 = 25,557,511
and
-1 x -25,557,511 = 25,557,511
Notice both answers equal 25,557,511
With that explanation out of the way, let's continue. Next, we take the number 25,557,511 and divide it by 2:
25,557,511 ÷ 2 = 12,778,755.5
If the quotient is a whole number, then 2 and 12,778,755.5 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 | 25,557,511 | |
| -1 | -25,557,511 |
Now, we try dividing 25,557,511 by 3:
25,557,511 ÷ 3 = 8,519,170.3333
If the quotient is a whole number, then 3 and 8,519,170.3333 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 | 25,557,511 | |
| -1 | -25,557,511 |
Let's try dividing by 4:
25,557,511 ÷ 4 = 6,389,377.75
If the quotient is a whole number, then 4 and 6,389,377.75 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 | 25,557,511 | |
| -1 | 25,557,511 |
If you did it right, you will end up with this table:
| 1 | 7 | 17 | 119 | 293 | 733 | 2,051 | 4,981 | 5,131 | 12,461 | 34,867 | 87,227 | 214,769 | 1,503,383 | 3,651,073 | 25,557,511 |
| -1 | -7 | -17 | -119 | -293 | -733 | -2,051 | -4,981 | -5,131 | -12,461 | -34,867 | -87,227 | -214,769 | -1,503,383 | -3,651,073 | -25,557,511 |
Here are some more numbers to try:
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