A:
Positive:
1 x 127804255 x 25560857 x 182577525 x 51121735 x 36515549 x 260825175 x 73031245 x 521651225 x 10433
Negative:
-1 x -12780425-5 x -2556085-7 x -1825775-25 x -511217-35 x -365155-49 x -260825-175 x -73031-245 x -52165-1225 x -10433
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 12,780,425, 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 | 12,780,425 | |
| -1 | -12,780,425 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,780,425.
Example:
1 x 12,780,425 = 12,780,425
and
-1 x -12,780,425 = 12,780,425
Notice both answers equal 12,780,425
With that explanation out of the way, let's continue. Next, we take the number 12,780,425 and divide it by 2:
12,780,425 ÷ 2 = 6,390,212.5
If the quotient is a whole number, then 2 and 6,390,212.5 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 | 12,780,425 | |
| -1 | -12,780,425 |
Now, we try dividing 12,780,425 by 3:
12,780,425 ÷ 3 = 4,260,141.6667
If the quotient is a whole number, then 3 and 4,260,141.6667 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 | 12,780,425 | |
| -1 | -12,780,425 |
Let's try dividing by 4:
12,780,425 ÷ 4 = 3,195,106.25
If the quotient is a whole number, then 4 and 3,195,106.25 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 | 12,780,425 | |
| -1 | 12,780,425 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 25 | 35 | 49 | 175 | 245 | 1,225 | 10,433 | 52,165 | 73,031 | 260,825 | 365,155 | 511,217 | 1,825,775 | 2,556,085 | 12,780,425 |
| -1 | -5 | -7 | -25 | -35 | -49 | -175 | -245 | -1,225 | -10,433 | -52,165 | -73,031 | -260,825 | -365,155 | -511,217 | -1,825,775 | -2,556,085 | -12,780,425 |
Here are some more numbers to try:
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