A:
Positive:
1 x 128901717 x 184145337 x 348383157 x 82103259 x 49769317 x 406631099 x 117292219 x 5809
Negative:
-1 x -12890171-7 x -1841453-37 x -348383-157 x -82103-259 x -49769-317 x -40663-1099 x -11729-2219 x -5809
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 12,890,171, 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 | 12,890,171 | |
| -1 | -12,890,171 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,890,171.
Example:
1 x 12,890,171 = 12,890,171
and
-1 x -12,890,171 = 12,890,171
Notice both answers equal 12,890,171
With that explanation out of the way, let's continue. Next, we take the number 12,890,171 and divide it by 2:
12,890,171 ÷ 2 = 6,445,085.5
If the quotient is a whole number, then 2 and 6,445,085.5 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 | 12,890,171 | |
| -1 | -12,890,171 |
Now, we try dividing 12,890,171 by 3:
12,890,171 ÷ 3 = 4,296,723.6667
If the quotient is a whole number, then 3 and 4,296,723.6667 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 | 12,890,171 | |
| -1 | -12,890,171 |
Let's try dividing by 4:
12,890,171 ÷ 4 = 3,222,542.75
If the quotient is a whole number, then 4 and 3,222,542.75 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 | 12,890,171 | |
| -1 | 12,890,171 |
If you did it right, you will end up with this table:
| 1 | 7 | 37 | 157 | 259 | 317 | 1,099 | 2,219 | 5,809 | 11,729 | 40,663 | 49,769 | 82,103 | 348,383 | 1,841,453 | 12,890,171 |
| -1 | -7 | -37 | -157 | -259 | -317 | -1,099 | -2,219 | -5,809 | -11,729 | -40,663 | -49,769 | -82,103 | -348,383 | -1,841,453 | -12,890,171 |
Here are some more numbers to try:
Try the factor calculator