A:
Positive:
1 x 259013955 x 518027913 x 199241565 x 39848383 x 312065415 x 624131079 x 240054801 x 5395
Negative:
-1 x -25901395-5 x -5180279-13 x -1992415-65 x -398483-83 x -312065-415 x -62413-1079 x -24005-4801 x -5395
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 25,901,395, 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 | 25,901,395 | |
| -1 | -25,901,395 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,901,395.
Example:
1 x 25,901,395 = 25,901,395
and
-1 x -25,901,395 = 25,901,395
Notice both answers equal 25,901,395
With that explanation out of the way, let's continue. Next, we take the number 25,901,395 and divide it by 2:
25,901,395 ÷ 2 = 12,950,697.5
If the quotient is a whole number, then 2 and 12,950,697.5 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 | 25,901,395 | |
| -1 | -25,901,395 |
Now, we try dividing 25,901,395 by 3:
25,901,395 ÷ 3 = 8,633,798.3333
If the quotient is a whole number, then 3 and 8,633,798.3333 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 | 25,901,395 | |
| -1 | -25,901,395 |
Let's try dividing by 4:
25,901,395 ÷ 4 = 6,475,348.75
If the quotient is a whole number, then 4 and 6,475,348.75 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 | 25,901,395 | |
| -1 | 25,901,395 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 83 | 415 | 1,079 | 4,801 | 5,395 | 24,005 | 62,413 | 312,065 | 398,483 | 1,992,415 | 5,180,279 | 25,901,395 |
| -1 | -5 | -13 | -65 | -83 | -415 | -1,079 | -4,801 | -5,395 | -24,005 | -62,413 | -312,065 | -398,483 | -1,992,415 | -5,180,279 | -25,901,395 |
Here are some more numbers to try:
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