A:
Positive:
1 x 12100908119 x 636889941 x 2951441163 x 742387779 x 155339953 x 1269773097 x 390736683 x 18107
Negative:
-1 x -121009081-19 x -6368899-41 x -2951441-163 x -742387-779 x -155339-953 x -126977-3097 x -39073-6683 x -18107
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 121,009,081, 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 | 121,009,081 | |
| -1 | -121,009,081 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,009,081.
Example:
1 x 121,009,081 = 121,009,081
and
-1 x -121,009,081 = 121,009,081
Notice both answers equal 121,009,081
With that explanation out of the way, let's continue. Next, we take the number 121,009,081 and divide it by 2:
121,009,081 ÷ 2 = 60,504,540.5
If the quotient is a whole number, then 2 and 60,504,540.5 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 | 121,009,081 | |
| -1 | -121,009,081 |
Now, we try dividing 121,009,081 by 3:
121,009,081 ÷ 3 = 40,336,360.3333
If the quotient is a whole number, then 3 and 40,336,360.3333 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 | 121,009,081 | |
| -1 | -121,009,081 |
Let's try dividing by 4:
121,009,081 ÷ 4 = 30,252,270.25
If the quotient is a whole number, then 4 and 30,252,270.25 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 | 121,009,081 | |
| -1 | 121,009,081 |
If you did it right, you will end up with this table:
| 1 | 19 | 41 | 163 | 779 | 953 | 3,097 | 6,683 | 18,107 | 39,073 | 126,977 | 155,339 | 742,387 | 2,951,441 | 6,368,899 | 121,009,081 |
| -1 | -19 | -41 | -163 | -779 | -953 | -3,097 | -6,683 | -18,107 | -39,073 | -126,977 | -155,339 | -742,387 | -2,951,441 | -6,368,899 | -121,009,081 |
Here are some more numbers to try:
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