A:
Positive:
1 x 120011655 x 240023311 x 109101555 x 218203113 x 106205565 x 212411243 x 96551931 x 6215
Negative:
-1 x -12001165-5 x -2400233-11 x -1091015-55 x -218203-113 x -106205-565 x -21241-1243 x -9655-1931 x -6215
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 12,001,165, 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 | 12,001,165 | |
| -1 | -12,001,165 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 12,001,165.
Example:
1 x 12,001,165 = 12,001,165
and
-1 x -12,001,165 = 12,001,165
Notice both answers equal 12,001,165
With that explanation out of the way, let's continue. Next, we take the number 12,001,165 and divide it by 2:
12,001,165 ÷ 2 = 6,000,582.5
If the quotient is a whole number, then 2 and 6,000,582.5 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 | 12,001,165 | |
| -1 | -12,001,165 |
Now, we try dividing 12,001,165 by 3:
12,001,165 ÷ 3 = 4,000,388.3333
If the quotient is a whole number, then 3 and 4,000,388.3333 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 | 12,001,165 | |
| -1 | -12,001,165 |
Let's try dividing by 4:
12,001,165 ÷ 4 = 3,000,291.25
If the quotient is a whole number, then 4 and 3,000,291.25 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 | 12,001,165 | |
| -1 | 12,001,165 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 55 | 113 | 565 | 1,243 | 1,931 | 6,215 | 9,655 | 21,241 | 106,205 | 218,203 | 1,091,015 | 2,400,233 | 12,001,165 |
| -1 | -5 | -11 | -55 | -113 | -565 | -1,243 | -1,931 | -6,215 | -9,655 | -21,241 | -106,205 | -218,203 | -1,091,015 | -2,400,233 | -12,001,165 |
Here are some more numbers to try:
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