A:
Positive:
1 x 2592086913 x 199391317 x 152475753 x 489073221 x 117289689 x 37621901 x 287692213 x 11713
Negative:
-1 x -25920869-13 x -1993913-17 x -1524757-53 x -489073-221 x -117289-689 x -37621-901 x -28769-2213 x -11713
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 25,920,869, 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 | 25,920,869 | |
| -1 | -25,920,869 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,920,869.
Example:
1 x 25,920,869 = 25,920,869
and
-1 x -25,920,869 = 25,920,869
Notice both answers equal 25,920,869
With that explanation out of the way, let's continue. Next, we take the number 25,920,869 and divide it by 2:
25,920,869 ÷ 2 = 12,960,434.5
If the quotient is a whole number, then 2 and 12,960,434.5 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 | 25,920,869 | |
| -1 | -25,920,869 |
Now, we try dividing 25,920,869 by 3:
25,920,869 ÷ 3 = 8,640,289.6667
If the quotient is a whole number, then 3 and 8,640,289.6667 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 | 25,920,869 | |
| -1 | -25,920,869 |
Let's try dividing by 4:
25,920,869 ÷ 4 = 6,480,217.25
If the quotient is a whole number, then 4 and 6,480,217.25 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 | 25,920,869 | |
| -1 | 25,920,869 |
If you did it right, you will end up with this table:
| 1 | 13 | 17 | 53 | 221 | 689 | 901 | 2,213 | 11,713 | 28,769 | 37,621 | 117,289 | 489,073 | 1,524,757 | 1,993,913 | 25,920,869 |
| -1 | -13 | -17 | -53 | -221 | -689 | -901 | -2,213 | -11,713 | -28,769 | -37,621 | -117,289 | -489,073 | -1,524,757 | -1,993,913 | -25,920,869 |
Here are some more numbers to try:
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