A:
Positive:
1 x 1203114055 x 2406228183 x 1449535239 x 503395415 x 2899071195 x 1006791213 x 991856065 x 19837
Negative:
-1 x -120311405-5 x -24062281-83 x -1449535-239 x -503395-415 x -289907-1195 x -100679-1213 x -99185-6065 x -19837
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 120,311,405, 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 | 120,311,405 | |
| -1 | -120,311,405 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 120,311,405.
Example:
1 x 120,311,405 = 120,311,405
and
-1 x -120,311,405 = 120,311,405
Notice both answers equal 120,311,405
With that explanation out of the way, let's continue. Next, we take the number 120,311,405 and divide it by 2:
120,311,405 ÷ 2 = 60,155,702.5
If the quotient is a whole number, then 2 and 60,155,702.5 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 | 120,311,405 | |
| -1 | -120,311,405 |
Now, we try dividing 120,311,405 by 3:
120,311,405 ÷ 3 = 40,103,801.6667
If the quotient is a whole number, then 3 and 40,103,801.6667 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 | 120,311,405 | |
| -1 | -120,311,405 |
Let's try dividing by 4:
120,311,405 ÷ 4 = 30,077,851.25
If the quotient is a whole number, then 4 and 30,077,851.25 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 | 120,311,405 | |
| -1 | 120,311,405 |
If you did it right, you will end up with this table:
| 1 | 5 | 83 | 239 | 415 | 1,195 | 1,213 | 6,065 | 19,837 | 99,185 | 100,679 | 289,907 | 503,395 | 1,449,535 | 24,062,281 | 120,311,405 |
| -1 | -5 | -83 | -239 | -415 | -1,195 | -1,213 | -6,065 | -19,837 | -99,185 | -100,679 | -289,907 | -503,395 | -1,449,535 | -24,062,281 | -120,311,405 |
Here are some more numbers to try:
Try the factor calculator