A:
Positive:
1 x 1211110155 x 2422220373 x 1659055365 x 331811449 x 269735739 x 1638852245 x 539473695 x 32777
Negative:
-1 x -121111015-5 x -24222203-73 x -1659055-365 x -331811-449 x -269735-739 x -163885-2245 x -53947-3695 x -32777
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 121,111,015, 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 | 121,111,015 | |
| -1 | -121,111,015 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,111,015.
Example:
1 x 121,111,015 = 121,111,015
and
-1 x -121,111,015 = 121,111,015
Notice both answers equal 121,111,015
With that explanation out of the way, let's continue. Next, we take the number 121,111,015 and divide it by 2:
121,111,015 ÷ 2 = 60,555,507.5
If the quotient is a whole number, then 2 and 60,555,507.5 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 | 121,111,015 | |
| -1 | -121,111,015 |
Now, we try dividing 121,111,015 by 3:
121,111,015 ÷ 3 = 40,370,338.3333
If the quotient is a whole number, then 3 and 40,370,338.3333 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 | 121,111,015 | |
| -1 | -121,111,015 |
Let's try dividing by 4:
121,111,015 ÷ 4 = 30,277,753.75
If the quotient is a whole number, then 4 and 30,277,753.75 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 | 121,111,015 | |
| -1 | 121,111,015 |
If you did it right, you will end up with this table:
| 1 | 5 | 73 | 365 | 449 | 739 | 2,245 | 3,695 | 32,777 | 53,947 | 163,885 | 269,735 | 331,811 | 1,659,055 | 24,222,203 | 121,111,015 |
| -1 | -5 | -73 | -365 | -449 | -739 | -2,245 | -3,695 | -32,777 | -53,947 | -163,885 | -269,735 | -331,811 | -1,659,055 | -24,222,203 | -121,111,015 |
Here are some more numbers to try:
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