A:
Positive:
1 x 2519785719 x 132620323 x 1095559109 x 231173437 x 57661529 x 476332071 x 121672507 x 10051
Negative:
-1 x -25197857-19 x -1326203-23 x -1095559-109 x -231173-437 x -57661-529 x -47633-2071 x -12167-2507 x -10051
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 25,197,857, 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 | 25,197,857 | |
| -1 | -25,197,857 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,197,857.
Example:
1 x 25,197,857 = 25,197,857
and
-1 x -25,197,857 = 25,197,857
Notice both answers equal 25,197,857
With that explanation out of the way, let's continue. Next, we take the number 25,197,857 and divide it by 2:
25,197,857 ÷ 2 = 12,598,928.5
If the quotient is a whole number, then 2 and 12,598,928.5 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 | 25,197,857 | |
| -1 | -25,197,857 |
Now, we try dividing 25,197,857 by 3:
25,197,857 ÷ 3 = 8,399,285.6667
If the quotient is a whole number, then 3 and 8,399,285.6667 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 | 25,197,857 | |
| -1 | -25,197,857 |
Let's try dividing by 4:
25,197,857 ÷ 4 = 6,299,464.25
If the quotient is a whole number, then 4 and 6,299,464.25 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 | 25,197,857 | |
| -1 | 25,197,857 |
If you did it right, you will end up with this table:
| 1 | 19 | 23 | 109 | 437 | 529 | 2,071 | 2,507 | 10,051 | 12,167 | 47,633 | 57,661 | 231,173 | 1,095,559 | 1,326,203 | 25,197,857 |
| -1 | -19 | -23 | -109 | -437 | -529 | -2,071 | -2,507 | -10,051 | -12,167 | -47,633 | -57,661 | -231,173 | -1,095,559 | -1,326,203 | -25,197,857 |
Here are some more numbers to try:
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