A:
Positive:
1 x 1210416655 x 2420833353 x 228380573 x 1658105265 x 456761365 x 3316213869 x 312856257 x 19345
Negative:
-1 x -121041665-5 x -24208333-53 x -2283805-73 x -1658105-265 x -456761-365 x -331621-3869 x -31285-6257 x -19345
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 121,041,665, 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 | 121,041,665 | |
| -1 | -121,041,665 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,041,665.
Example:
1 x 121,041,665 = 121,041,665
and
-1 x -121,041,665 = 121,041,665
Notice both answers equal 121,041,665
With that explanation out of the way, let's continue. Next, we take the number 121,041,665 and divide it by 2:
121,041,665 ÷ 2 = 60,520,832.5
If the quotient is a whole number, then 2 and 60,520,832.5 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 | 121,041,665 | |
| -1 | -121,041,665 |
Now, we try dividing 121,041,665 by 3:
121,041,665 ÷ 3 = 40,347,221.6667
If the quotient is a whole number, then 3 and 40,347,221.6667 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 | 121,041,665 | |
| -1 | -121,041,665 |
Let's try dividing by 4:
121,041,665 ÷ 4 = 30,260,416.25
If the quotient is a whole number, then 4 and 30,260,416.25 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 | 121,041,665 | |
| -1 | 121,041,665 |
If you did it right, you will end up with this table:
| 1 | 5 | 53 | 73 | 265 | 365 | 3,869 | 6,257 | 19,345 | 31,285 | 331,621 | 456,761 | 1,658,105 | 2,283,805 | 24,208,333 | 121,041,665 |
| -1 | -5 | -53 | -73 | -265 | -365 | -3,869 | -6,257 | -19,345 | -31,285 | -331,621 | -456,761 | -1,658,105 | -2,283,805 | -24,208,333 | -121,041,665 |
Here are some more numbers to try:
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