A:
Positive:
1 x 1213132555 x 242626517 x 1733046535 x 3466093421 x 2881552105 x 576312947 x 411658233 x 14735
Negative:
-1 x -121313255-5 x -24262651-7 x -17330465-35 x -3466093-421 x -288155-2105 x -57631-2947 x -41165-8233 x -14735
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 121,313,255, 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 | 121,313,255 | |
| -1 | -121,313,255 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,313,255.
Example:
1 x 121,313,255 = 121,313,255
and
-1 x -121,313,255 = 121,313,255
Notice both answers equal 121,313,255
With that explanation out of the way, let's continue. Next, we take the number 121,313,255 and divide it by 2:
121,313,255 ÷ 2 = 60,656,627.5
If the quotient is a whole number, then 2 and 60,656,627.5 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 | 121,313,255 | |
| -1 | -121,313,255 |
Now, we try dividing 121,313,255 by 3:
121,313,255 ÷ 3 = 40,437,751.6667
If the quotient is a whole number, then 3 and 40,437,751.6667 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 | 121,313,255 | |
| -1 | -121,313,255 |
Let's try dividing by 4:
121,313,255 ÷ 4 = 30,328,313.75
If the quotient is a whole number, then 4 and 30,328,313.75 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 | 121,313,255 | |
| -1 | 121,313,255 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 35 | 421 | 2,105 | 2,947 | 8,233 | 14,735 | 41,165 | 57,631 | 288,155 | 3,466,093 | 17,330,465 | 24,262,651 | 121,313,255 |
| -1 | -5 | -7 | -35 | -421 | -2,105 | -2,947 | -8,233 | -14,735 | -41,165 | -57,631 | -288,155 | -3,466,093 | -17,330,465 | -24,262,651 | -121,313,255 |
Here are some more numbers to try:
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