A:
Positive:
1 x 1200401655 x 240080337 x 1714859535 x 3429719811 x 1480154055 x 296034229 x 283855677 x 21145
Negative:
-1 x -120040165-5 x -24008033-7 x -17148595-35 x -3429719-811 x -148015-4055 x -29603-4229 x -28385-5677 x -21145
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 120,040,165, 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 | 120,040,165 | |
| -1 | -120,040,165 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 120,040,165.
Example:
1 x 120,040,165 = 120,040,165
and
-1 x -120,040,165 = 120,040,165
Notice both answers equal 120,040,165
With that explanation out of the way, let's continue. Next, we take the number 120,040,165 and divide it by 2:
120,040,165 ÷ 2 = 60,020,082.5
If the quotient is a whole number, then 2 and 60,020,082.5 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 | 120,040,165 | |
| -1 | -120,040,165 |
Now, we try dividing 120,040,165 by 3:
120,040,165 ÷ 3 = 40,013,388.3333
If the quotient is a whole number, then 3 and 40,013,388.3333 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 | 120,040,165 | |
| -1 | -120,040,165 |
Let's try dividing by 4:
120,040,165 ÷ 4 = 30,010,041.25
If the quotient is a whole number, then 4 and 30,010,041.25 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 | 120,040,165 | |
| -1 | 120,040,165 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 811 | 4,055 | 4,229 | 5,677 | 21,145 | 28,385 | 29,603 | 148,015 | 3,429,719 | 17,148,595 | 24,008,033 | 120,040,165 |
| -1 | -5 | -7 | -35 | -811 | -4,055 | -4,229 | -5,677 | -21,145 | -28,385 | -29,603 | -148,015 | -3,429,719 | -17,148,595 | -24,008,033 | -120,040,165 |
Here are some more numbers to try:
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