A:
Positive:
1 x 12912255 x 25824513 x 9932525 x 5164929 x 4452565 x 19865137 x 9425145 x 8905325 x 3973377 x 3425685 x 1885725 x 1781
Negative:
-1 x -1291225-5 x -258245-13 x -99325-25 x -51649-29 x -44525-65 x -19865-137 x -9425-145 x -8905-325 x -3973-377 x -3425-685 x -1885-725 x -1781
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 1,291,225, 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 | 1,291,225 | |
| -1 | -1,291,225 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 1,291,225.
Example:
1 x 1,291,225 = 1,291,225
and
-1 x -1,291,225 = 1,291,225
Notice both answers equal 1,291,225
With that explanation out of the way, let's continue. Next, we take the number 1,291,225 and divide it by 2:
1,291,225 ÷ 2 = 645,612.5
If the quotient is a whole number, then 2 and 645,612.5 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 | 1,291,225 | |
| -1 | -1,291,225 |
Now, we try dividing 1,291,225 by 3:
1,291,225 ÷ 3 = 430,408.3333
If the quotient is a whole number, then 3 and 430,408.3333 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 | 1,291,225 | |
| -1 | -1,291,225 |
Let's try dividing by 4:
1,291,225 ÷ 4 = 322,806.25
If the quotient is a whole number, then 4 and 322,806.25 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 | 1,291,225 | |
| -1 | 1,291,225 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 25 | 29 | 65 | 137 | 145 | 325 | 377 | 685 | 725 | 1,781 | 1,885 | 3,425 | 3,973 | 8,905 | 9,425 | 19,865 | 44,525 | 51,649 | 99,325 | 258,245 | 1,291,225 |
| -1 | -5 | -13 | -25 | -29 | -65 | -137 | -145 | -325 | -377 | -685 | -725 | -1,781 | -1,885 | -3,425 | -3,973 | -8,905 | -9,425 | -19,865 | -44,525 | -51,649 | -99,325 | -258,245 | -1,291,225 |
Here are some more numbers to try:
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