A:
Positive:
1 x 1201511355 x 2403022713 x 924239565 x 1848479647 x 1857052857 x 420553235 x 371418411 x 14285
Negative:
-1 x -120151135-5 x -24030227-13 x -9242395-65 x -1848479-647 x -185705-2857 x -42055-3235 x -37141-8411 x -14285
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 120,151,135, 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 | 120,151,135 | |
| -1 | -120,151,135 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 120,151,135.
Example:
1 x 120,151,135 = 120,151,135
and
-1 x -120,151,135 = 120,151,135
Notice both answers equal 120,151,135
With that explanation out of the way, let's continue. Next, we take the number 120,151,135 and divide it by 2:
120,151,135 ÷ 2 = 60,075,567.5
If the quotient is a whole number, then 2 and 60,075,567.5 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 | 120,151,135 | |
| -1 | -120,151,135 |
Now, we try dividing 120,151,135 by 3:
120,151,135 ÷ 3 = 40,050,378.3333
If the quotient is a whole number, then 3 and 40,050,378.3333 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 | 120,151,135 | |
| -1 | -120,151,135 |
Let's try dividing by 4:
120,151,135 ÷ 4 = 30,037,783.75
If the quotient is a whole number, then 4 and 30,037,783.75 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 | 120,151,135 | |
| -1 | 120,151,135 |
If you did it right, you will end up with this table:
| 1 | 5 | 13 | 65 | 647 | 2,857 | 3,235 | 8,411 | 14,285 | 37,141 | 42,055 | 185,705 | 1,848,479 | 9,242,395 | 24,030,227 | 120,151,135 |
| -1 | -5 | -13 | -65 | -647 | -2,857 | -3,235 | -8,411 | -14,285 | -37,141 | -42,055 | -185,705 | -1,848,479 | -9,242,395 | -24,030,227 | -120,151,135 |
Here are some more numbers to try:
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