A:
Positive:
1 x 1216610997 x 1738015723 x 5289613161 x 755659383 x 3176531973 x 616632681 x 453798809 x 13811
Negative:
-1 x -121661099-7 x -17380157-23 x -5289613-161 x -755659-383 x -317653-1973 x -61663-2681 x -45379-8809 x -13811
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 121,661,099, 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 | 121,661,099 | |
| -1 | -121,661,099 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,661,099.
Example:
1 x 121,661,099 = 121,661,099
and
-1 x -121,661,099 = 121,661,099
Notice both answers equal 121,661,099
With that explanation out of the way, let's continue. Next, we take the number 121,661,099 and divide it by 2:
121,661,099 ÷ 2 = 60,830,549.5
If the quotient is a whole number, then 2 and 60,830,549.5 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 | 121,661,099 | |
| -1 | -121,661,099 |
Now, we try dividing 121,661,099 by 3:
121,661,099 ÷ 3 = 40,553,699.6667
If the quotient is a whole number, then 3 and 40,553,699.6667 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 | 121,661,099 | |
| -1 | -121,661,099 |
Let's try dividing by 4:
121,661,099 ÷ 4 = 30,415,274.75
If the quotient is a whole number, then 4 and 30,415,274.75 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 | 121,661,099 | |
| -1 | 121,661,099 |
If you did it right, you will end up with this table:
| 1 | 7 | 23 | 161 | 383 | 1,973 | 2,681 | 8,809 | 13,811 | 45,379 | 61,663 | 317,653 | 755,659 | 5,289,613 | 17,380,157 | 121,661,099 |
| -1 | -7 | -23 | -161 | -383 | -1,973 | -2,681 | -8,809 | -13,811 | -45,379 | -61,663 | -317,653 | -755,659 | -5,289,613 | -17,380,157 | -121,661,099 |
Here are some more numbers to try:
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