A:
Positive:
1 x 1212550017 x 17322143137 x 885073227 x 534163557 x 217693959 x 1264391589 x 763093899 x 31099
Negative:
-1 x -121255001-7 x -17322143-137 x -885073-227 x -534163-557 x -217693-959 x -126439-1589 x -76309-3899 x -31099
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 121,255,001, 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 | 121,255,001 | |
| -1 | -121,255,001 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,255,001.
Example:
1 x 121,255,001 = 121,255,001
and
-1 x -121,255,001 = 121,255,001
Notice both answers equal 121,255,001
With that explanation out of the way, let's continue. Next, we take the number 121,255,001 and divide it by 2:
121,255,001 ÷ 2 = 60,627,500.5
If the quotient is a whole number, then 2 and 60,627,500.5 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 | 121,255,001 | |
| -1 | -121,255,001 |
Now, we try dividing 121,255,001 by 3:
121,255,001 ÷ 3 = 40,418,333.6667
If the quotient is a whole number, then 3 and 40,418,333.6667 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 | 121,255,001 | |
| -1 | -121,255,001 |
Let's try dividing by 4:
121,255,001 ÷ 4 = 30,313,750.25
If the quotient is a whole number, then 4 and 30,313,750.25 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 | 121,255,001 | |
| -1 | 121,255,001 |
If you did it right, you will end up with this table:
| 1 | 7 | 137 | 227 | 557 | 959 | 1,589 | 3,899 | 31,099 | 76,309 | 126,439 | 217,693 | 534,163 | 885,073 | 17,322,143 | 121,255,001 |
| -1 | -7 | -137 | -227 | -557 | -959 | -1,589 | -3,899 | -31,099 | -76,309 | -126,439 | -217,693 | -534,163 | -885,073 | -17,322,143 | -121,255,001 |
Here are some more numbers to try:
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