A:
Positive:
1 x 2539139911 x 230830953 x 47908397 x 261767449 x 56551583 x 435531067 x 237974939 x 5141
Negative:
-1 x -25391399-11 x -2308309-53 x -479083-97 x -261767-449 x -56551-583 x -43553-1067 x -23797-4939 x -5141
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 25,391,399, 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 | 25,391,399 | |
| -1 | -25,391,399 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,391,399.
Example:
1 x 25,391,399 = 25,391,399
and
-1 x -25,391,399 = 25,391,399
Notice both answers equal 25,391,399
With that explanation out of the way, let's continue. Next, we take the number 25,391,399 and divide it by 2:
25,391,399 ÷ 2 = 12,695,699.5
If the quotient is a whole number, then 2 and 12,695,699.5 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 | 25,391,399 | |
| -1 | -25,391,399 |
Now, we try dividing 25,391,399 by 3:
25,391,399 ÷ 3 = 8,463,799.6667
If the quotient is a whole number, then 3 and 8,463,799.6667 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 | 25,391,399 | |
| -1 | -25,391,399 |
Let's try dividing by 4:
25,391,399 ÷ 4 = 6,347,849.75
If the quotient is a whole number, then 4 and 6,347,849.75 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 | 25,391,399 | |
| -1 | 25,391,399 |
If you did it right, you will end up with this table:
| 1 | 11 | 53 | 97 | 449 | 583 | 1,067 | 4,939 | 5,141 | 23,797 | 43,553 | 56,551 | 261,767 | 479,083 | 2,308,309 | 25,391,399 |
| -1 | -11 | -53 | -97 | -449 | -583 | -1,067 | -4,939 | -5,141 | -23,797 | -43,553 | -56,551 | -261,767 | -479,083 | -2,308,309 | -25,391,399 |
Here are some more numbers to try:
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