A:
Positive:
1 x 1201626655 x 240325337 x 1716609531 x 387621535 x 3433219155 x 775243217 x 5537451085 x 110749
Negative:
-1 x -120162665-5 x -24032533-7 x -17166095-31 x -3876215-35 x -3433219-155 x -775243-217 x -553745-1085 x -110749
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 120,162,665, 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 | 120,162,665 | |
| -1 | -120,162,665 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 120,162,665.
Example:
1 x 120,162,665 = 120,162,665
and
-1 x -120,162,665 = 120,162,665
Notice both answers equal 120,162,665
With that explanation out of the way, let's continue. Next, we take the number 120,162,665 and divide it by 2:
120,162,665 ÷ 2 = 60,081,332.5
If the quotient is a whole number, then 2 and 60,081,332.5 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 | 120,162,665 | |
| -1 | -120,162,665 |
Now, we try dividing 120,162,665 by 3:
120,162,665 ÷ 3 = 40,054,221.6667
If the quotient is a whole number, then 3 and 40,054,221.6667 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 | 120,162,665 | |
| -1 | -120,162,665 |
Let's try dividing by 4:
120,162,665 ÷ 4 = 30,040,666.25
If the quotient is a whole number, then 4 and 30,040,666.25 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 | 120,162,665 | |
| -1 | 120,162,665 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 31 | 35 | 155 | 217 | 1,085 | 110,749 | 553,745 | 775,243 | 3,433,219 | 3,876,215 | 17,166,095 | 24,032,533 | 120,162,665 |
| -1 | -5 | -7 | -31 | -35 | -155 | -217 | -1,085 | -110,749 | -553,745 | -775,243 | -3,433,219 | -3,876,215 | -17,166,095 | -24,032,533 | -120,162,665 |
Here are some more numbers to try:
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