A:
Positive:
1 x 31214055 x 6242817 x 44591535 x 89183101 x 30905505 x 6181707 x 4415883 x 3535
Negative:
-1 x -3121405-5 x -624281-7 x -445915-35 x -89183-101 x -30905-505 x -6181-707 x -4415-883 x -3535
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 3,121,405, 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 | 3,121,405 | |
| -1 | -3,121,405 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 3,121,405.
Example:
1 x 3,121,405 = 3,121,405
and
-1 x -3,121,405 = 3,121,405
Notice both answers equal 3,121,405
With that explanation out of the way, let's continue. Next, we take the number 3,121,405 and divide it by 2:
3,121,405 ÷ 2 = 1,560,702.5
If the quotient is a whole number, then 2 and 1,560,702.5 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 | 3,121,405 | |
| -1 | -3,121,405 |
Now, we try dividing 3,121,405 by 3:
3,121,405 ÷ 3 = 1,040,468.3333
If the quotient is a whole number, then 3 and 1,040,468.3333 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 | 3,121,405 | |
| -1 | -3,121,405 |
Let's try dividing by 4:
3,121,405 ÷ 4 = 780,351.25
If the quotient is a whole number, then 4 and 780,351.25 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 | 3,121,405 | |
| -1 | 3,121,405 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 101 | 505 | 707 | 883 | 3,535 | 4,415 | 6,181 | 30,905 | 89,183 | 445,915 | 624,281 | 3,121,405 |
| -1 | -5 | -7 | -35 | -101 | -505 | -707 | -883 | -3,535 | -4,415 | -6,181 | -30,905 | -89,183 | -445,915 | -624,281 | -3,121,405 |
Here are some more numbers to try:
Try the factor calculator