A:
Positive:
1 x 2552041713 x 196310917 x 150120137 x 689741221 x 115477481 x 53057629 x 405733121 x 8177
Negative:
-1 x -25520417-13 x -1963109-17 x -1501201-37 x -689741-221 x -115477-481 x -53057-629 x -40573-3121 x -8177
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 25,520,417, 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 | 25,520,417 | |
| -1 | -25,520,417 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,520,417.
Example:
1 x 25,520,417 = 25,520,417
and
-1 x -25,520,417 = 25,520,417
Notice both answers equal 25,520,417
With that explanation out of the way, let's continue. Next, we take the number 25,520,417 and divide it by 2:
25,520,417 ÷ 2 = 12,760,208.5
If the quotient is a whole number, then 2 and 12,760,208.5 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 | 25,520,417 | |
| -1 | -25,520,417 |
Now, we try dividing 25,520,417 by 3:
25,520,417 ÷ 3 = 8,506,805.6667
If the quotient is a whole number, then 3 and 8,506,805.6667 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 | 25,520,417 | |
| -1 | -25,520,417 |
Let's try dividing by 4:
25,520,417 ÷ 4 = 6,380,104.25
If the quotient is a whole number, then 4 and 6,380,104.25 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 | 25,520,417 | |
| -1 | 25,520,417 |
If you did it right, you will end up with this table:
| 1 | 13 | 17 | 37 | 221 | 481 | 629 | 3,121 | 8,177 | 40,573 | 53,057 | 115,477 | 689,741 | 1,501,201 | 1,963,109 | 25,520,417 |
| -1 | -13 | -17 | -37 | -221 | -481 | -629 | -3,121 | -8,177 | -40,573 | -53,057 | -115,477 | -689,741 | -1,501,201 | -1,963,109 | -25,520,417 |
Here are some more numbers to try:
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