A:
Positive:
1 x 1201656655 x 2403313373 x 1646105365 x 329221401 x 299665821 x 1463652005 x 599334105 x 29273
Negative:
-1 x -120165665-5 x -24033133-73 x -1646105-365 x -329221-401 x -299665-821 x -146365-2005 x -59933-4105 x -29273
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 120,165,665, 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 | 120,165,665 | |
| -1 | -120,165,665 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 120,165,665.
Example:
1 x 120,165,665 = 120,165,665
and
-1 x -120,165,665 = 120,165,665
Notice both answers equal 120,165,665
With that explanation out of the way, let's continue. Next, we take the number 120,165,665 and divide it by 2:
120,165,665 ÷ 2 = 60,082,832.5
If the quotient is a whole number, then 2 and 60,082,832.5 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 | 120,165,665 | |
| -1 | -120,165,665 |
Now, we try dividing 120,165,665 by 3:
120,165,665 ÷ 3 = 40,055,221.6667
If the quotient is a whole number, then 3 and 40,055,221.6667 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 | 120,165,665 | |
| -1 | -120,165,665 |
Let's try dividing by 4:
120,165,665 ÷ 4 = 30,041,416.25
If the quotient is a whole number, then 4 and 30,041,416.25 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 | 120,165,665 | |
| -1 | 120,165,665 |
If you did it right, you will end up with this table:
| 1 | 5 | 73 | 365 | 401 | 821 | 2,005 | 4,105 | 29,273 | 59,933 | 146,365 | 299,665 | 329,221 | 1,646,105 | 24,033,133 | 120,165,665 |
| -1 | -5 | -73 | -365 | -401 | -821 | -2,005 | -4,105 | -29,273 | -59,933 | -146,365 | -299,665 | -329,221 | -1,646,105 | -24,033,133 | -120,165,665 |
Here are some more numbers to try:
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