A:
Positive:
1 x 253406655 x 50681337 x 362009535 x 72401941 x 618065205 x 123613287 x 882951435 x 17659
Negative:
-1 x -25340665-5 x -5068133-7 x -3620095-35 x -724019-41 x -618065-205 x -123613-287 x -88295-1435 x -17659
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 25,340,665, 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 | 25,340,665 | |
| -1 | -25,340,665 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,340,665.
Example:
1 x 25,340,665 = 25,340,665
and
-1 x -25,340,665 = 25,340,665
Notice both answers equal 25,340,665
With that explanation out of the way, let's continue. Next, we take the number 25,340,665 and divide it by 2:
25,340,665 ÷ 2 = 12,670,332.5
If the quotient is a whole number, then 2 and 12,670,332.5 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 | 25,340,665 | |
| -1 | -25,340,665 |
Now, we try dividing 25,340,665 by 3:
25,340,665 ÷ 3 = 8,446,888.3333
If the quotient is a whole number, then 3 and 8,446,888.3333 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 | 25,340,665 | |
| -1 | -25,340,665 |
Let's try dividing by 4:
25,340,665 ÷ 4 = 6,335,166.25
If the quotient is a whole number, then 4 and 6,335,166.25 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 | 25,340,665 | |
| -1 | 25,340,665 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 41 | 205 | 287 | 1,435 | 17,659 | 88,295 | 123,613 | 618,065 | 724,019 | 3,620,095 | 5,068,133 | 25,340,665 |
| -1 | -5 | -7 | -35 | -41 | -205 | -287 | -1,435 | -17,659 | -88,295 | -123,613 | -618,065 | -724,019 | -3,620,095 | -5,068,133 | -25,340,665 |
Here are some more numbers to try:
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