A:
Positive:
1 x 1215441055 x 2430882153 x 2293285265 x 458657337 x 3606651361 x 893051685 x 721336805 x 17861
Negative:
-1 x -121544105-5 x -24308821-53 x -2293285-265 x -458657-337 x -360665-1361 x -89305-1685 x -72133-6805 x -17861
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 121,544,105, 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 | 121,544,105 | |
| -1 | -121,544,105 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,544,105.
Example:
1 x 121,544,105 = 121,544,105
and
-1 x -121,544,105 = 121,544,105
Notice both answers equal 121,544,105
With that explanation out of the way, let's continue. Next, we take the number 121,544,105 and divide it by 2:
121,544,105 ÷ 2 = 60,772,052.5
If the quotient is a whole number, then 2 and 60,772,052.5 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 | 121,544,105 | |
| -1 | -121,544,105 |
Now, we try dividing 121,544,105 by 3:
121,544,105 ÷ 3 = 40,514,701.6667
If the quotient is a whole number, then 3 and 40,514,701.6667 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 | 121,544,105 | |
| -1 | -121,544,105 |
Let's try dividing by 4:
121,544,105 ÷ 4 = 30,386,026.25
If the quotient is a whole number, then 4 and 30,386,026.25 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 | 121,544,105 | |
| -1 | 121,544,105 |
If you did it right, you will end up with this table:
| 1 | 5 | 53 | 265 | 337 | 1,361 | 1,685 | 6,805 | 17,861 | 72,133 | 89,305 | 360,665 | 458,657 | 2,293,285 | 24,308,821 | 121,544,105 |
| -1 | -5 | -53 | -265 | -337 | -1,361 | -1,685 | -6,805 | -17,861 | -72,133 | -89,305 | -360,665 | -458,657 | -2,293,285 | -24,308,821 | -121,544,105 |
Here are some more numbers to try:
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