A:
Positive:
1 x 1211214555 x 242242917 x 1730306513 x 931703535 x 346061365 x 186340791 x 1331005169 x 716695455 x 266201845 x 1433391183 x 1023855915 x 20477
Negative:
-1 x -121121455-5 x -24224291-7 x -17303065-13 x -9317035-35 x -3460613-65 x -1863407-91 x -1331005-169 x -716695-455 x -266201-845 x -143339-1183 x -102385-5915 x -20477
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 121,121,455, 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 | 121,121,455 | |
| -1 | -121,121,455 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,121,455.
Example:
1 x 121,121,455 = 121,121,455
and
-1 x -121,121,455 = 121,121,455
Notice both answers equal 121,121,455
With that explanation out of the way, let's continue. Next, we take the number 121,121,455 and divide it by 2:
121,121,455 ÷ 2 = 60,560,727.5
If the quotient is a whole number, then 2 and 60,560,727.5 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 | 121,121,455 | |
| -1 | -121,121,455 |
Now, we try dividing 121,121,455 by 3:
121,121,455 ÷ 3 = 40,373,818.3333
If the quotient is a whole number, then 3 and 40,373,818.3333 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 | 121,121,455 | |
| -1 | -121,121,455 |
Let's try dividing by 4:
121,121,455 ÷ 4 = 30,280,363.75
If the quotient is a whole number, then 4 and 30,280,363.75 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 | 121,121,455 | |
| -1 | 121,121,455 |
If you did it right, you will end up with this table:
| 1 | 5 | 7 | 13 | 35 | 65 | 91 | 169 | 455 | 845 | 1,183 | 5,915 | 20,477 | 102,385 | 143,339 | 266,201 | 716,695 | 1,331,005 | 1,863,407 | 3,460,613 | 9,317,035 | 17,303,065 | 24,224,291 | 121,121,455 |
| -1 | -5 | -7 | -13 | -35 | -65 | -91 | -169 | -455 | -845 | -1,183 | -5,915 | -20,477 | -102,385 | -143,339 | -266,201 | -716,695 | -1,331,005 | -1,863,407 | -3,460,613 | -9,317,035 | -17,303,065 | -24,224,291 | -121,121,455 |
Here are some more numbers to try:
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