A:
Positive:
1 x 253611655 x 507223341 x 618565193 x 131405205 x 123713641 x 39565965 x 262813205 x 7913
Negative:
-1 x -25361165-5 x -5072233-41 x -618565-193 x -131405-205 x -123713-641 x -39565-965 x -26281-3205 x -7913
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 25,361,165, 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 | 25,361,165 | |
| -1 | -25,361,165 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 25,361,165.
Example:
1 x 25,361,165 = 25,361,165
and
-1 x -25,361,165 = 25,361,165
Notice both answers equal 25,361,165
With that explanation out of the way, let's continue. Next, we take the number 25,361,165 and divide it by 2:
25,361,165 ÷ 2 = 12,680,582.5
If the quotient is a whole number, then 2 and 12,680,582.5 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 | 25,361,165 | |
| -1 | -25,361,165 |
Now, we try dividing 25,361,165 by 3:
25,361,165 ÷ 3 = 8,453,721.6667
If the quotient is a whole number, then 3 and 8,453,721.6667 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 | 25,361,165 | |
| -1 | -25,361,165 |
Let's try dividing by 4:
25,361,165 ÷ 4 = 6,340,291.25
If the quotient is a whole number, then 4 and 6,340,291.25 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 | 25,361,165 | |
| -1 | 25,361,165 |
If you did it right, you will end up with this table:
| 1 | 5 | 41 | 193 | 205 | 641 | 965 | 3,205 | 7,913 | 26,281 | 39,565 | 123,713 | 131,405 | 618,565 | 5,072,233 | 25,361,165 |
| -1 | -5 | -41 | -193 | -205 | -641 | -965 | -3,205 | -7,913 | -26,281 | -39,565 | -123,713 | -131,405 | -618,565 | -5,072,233 | -25,361,165 |
Here are some more numbers to try:
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