A:
Positive:
1 x 1210551255 x 2421102525 x 4842205125 x 968441229 x 5286251145 x 1057254229 x 286255725 x 21145
Negative:
-1 x -121055125-5 x -24211025-25 x -4842205-125 x -968441-229 x -528625-1145 x -105725-4229 x -28625-5725 x -21145
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 121,055,125, 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 | 121,055,125 | |
| -1 | -121,055,125 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,055,125.
Example:
1 x 121,055,125 = 121,055,125
and
-1 x -121,055,125 = 121,055,125
Notice both answers equal 121,055,125
With that explanation out of the way, let's continue. Next, we take the number 121,055,125 and divide it by 2:
121,055,125 ÷ 2 = 60,527,562.5
If the quotient is a whole number, then 2 and 60,527,562.5 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 | 121,055,125 | |
| -1 | -121,055,125 |
Now, we try dividing 121,055,125 by 3:
121,055,125 ÷ 3 = 40,351,708.3333
If the quotient is a whole number, then 3 and 40,351,708.3333 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 | 121,055,125 | |
| -1 | -121,055,125 |
Let's try dividing by 4:
121,055,125 ÷ 4 = 30,263,781.25
If the quotient is a whole number, then 4 and 30,263,781.25 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 | 121,055,125 | |
| -1 | 121,055,125 |
If you did it right, you will end up with this table:
| 1 | 5 | 25 | 125 | 229 | 1,145 | 4,229 | 5,725 | 21,145 | 28,625 | 105,725 | 528,625 | 968,441 | 4,842,205 | 24,211,025 | 121,055,125 |
| -1 | -5 | -25 | -125 | -229 | -1,145 | -4,229 | -5,725 | -21,145 | -28,625 | -105,725 | -528,625 | -968,441 | -4,842,205 | -24,211,025 | -121,055,125 |
Here are some more numbers to try:
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