A:
Positive:
1 x 1201662555 x 2403325111 x 1092420555 x 2184841233 x 5157351165 x 1031472563 x 468859377 x 12815
Negative:
-1 x -120166255-5 x -24033251-11 x -10924205-55 x -2184841-233 x -515735-1165 x -103147-2563 x -46885-9377 x -12815
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 120,166,255, 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 | 120,166,255 | |
| -1 | -120,166,255 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 120,166,255.
Example:
1 x 120,166,255 = 120,166,255
and
-1 x -120,166,255 = 120,166,255
Notice both answers equal 120,166,255
With that explanation out of the way, let's continue. Next, we take the number 120,166,255 and divide it by 2:
120,166,255 ÷ 2 = 60,083,127.5
If the quotient is a whole number, then 2 and 60,083,127.5 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 | 120,166,255 | |
| -1 | -120,166,255 |
Now, we try dividing 120,166,255 by 3:
120,166,255 ÷ 3 = 40,055,418.3333
If the quotient is a whole number, then 3 and 40,055,418.3333 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 | 120,166,255 | |
| -1 | -120,166,255 |
Let's try dividing by 4:
120,166,255 ÷ 4 = 30,041,563.75
If the quotient is a whole number, then 4 and 30,041,563.75 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 | 120,166,255 | |
| -1 | 120,166,255 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 233 | 1,165 | 2,563 | 9,377 | 12,815 | 46,885 | 103,147 | 515,735 | 2,184,841 | 10,924,205 | 24,033,251 | 120,166,255 |
| -1 | -5 | -11 | -55 | -233 | -1,165 | -2,563 | -9,377 | -12,815 | -46,885 | -103,147 | -515,735 | -2,184,841 | -10,924,205 | -24,033,251 | -120,166,255 |
Here are some more numbers to try:
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