A:
Positive:
1 x 257431855 x 514863713 x 198024517 x 151430565 x 39604985 x 302861221 x 1164851105 x 23297
Negative:
-1 x -25743185-5 x -5148637-13 x -1980245-17 x -1514305-65 x -396049-85 x -302861-221 x -116485-1105 x -23297
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 25,743,185, 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 | 25,743,185 | |
| -1 | -25,743,185 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,743,185.
Example:
1 x 25,743,185 = 25,743,185
and
-1 x -25,743,185 = 25,743,185
Notice both answers equal 25,743,185
With that explanation out of the way, let's continue. Next, we take the number 25,743,185 and divide it by 2:
25,743,185 ÷ 2 = 12,871,592.5
If the quotient is a whole number, then 2 and 12,871,592.5 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 | 25,743,185 | |
| -1 | -25,743,185 |
Now, we try dividing 25,743,185 by 3:
25,743,185 ÷ 3 = 8,581,061.6667
If the quotient is a whole number, then 3 and 8,581,061.6667 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 | 25,743,185 | |
| -1 | -25,743,185 |
Let's try dividing by 4:
25,743,185 ÷ 4 = 6,435,796.25
If the quotient is a whole number, then 4 and 6,435,796.25 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 | 25,743,185 | |
| -1 | 25,743,185 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 17 | 65 | 85 | 221 | 1,105 | 23,297 | 116,485 | 302,861 | 396,049 | 1,514,305 | 1,980,245 | 5,148,637 | 25,743,185 |
| -1 | -5 | -13 | -17 | -65 | -85 | -221 | -1,105 | -23,297 | -116,485 | -302,861 | -396,049 | -1,514,305 | -1,980,245 | -5,148,637 | -25,743,185 |
Here are some more numbers to try:
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