A:
Positive:
1 x 1212143355 x 2424286711 x 1101948517 x 713025555 x 220389785 x 1426051187 x 648205935 x 129641
Negative:
-1 x -121214335-5 x -24242867-11 x -11019485-17 x -7130255-55 x -2203897-85 x -1426051-187 x -648205-935 x -129641
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 121,214,335, 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 | 121,214,335 | |
| -1 | -121,214,335 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,214,335.
Example:
1 x 121,214,335 = 121,214,335
and
-1 x -121,214,335 = 121,214,335
Notice both answers equal 121,214,335
With that explanation out of the way, let's continue. Next, we take the number 121,214,335 and divide it by 2:
121,214,335 ÷ 2 = 60,607,167.5
If the quotient is a whole number, then 2 and 60,607,167.5 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 | 121,214,335 | |
| -1 | -121,214,335 |
Now, we try dividing 121,214,335 by 3:
121,214,335 ÷ 3 = 40,404,778.3333
If the quotient is a whole number, then 3 and 40,404,778.3333 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 | 121,214,335 | |
| -1 | -121,214,335 |
Let's try dividing by 4:
121,214,335 ÷ 4 = 30,303,583.75
If the quotient is a whole number, then 4 and 30,303,583.75 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 | 121,214,335 | |
| -1 | 121,214,335 |
If you did it right, you will end up with this table:
| 1 | 5 | 11 | 17 | 55 | 85 | 187 | 935 | 129,641 | 648,205 | 1,426,051 | 2,203,897 | 7,130,255 | 11,019,485 | 24,242,867 | 121,214,335 |
| -1 | -5 | -11 | -17 | -55 | -85 | -187 | -935 | -129,641 | -648,205 | -1,426,051 | -2,203,897 | -7,130,255 | -11,019,485 | -24,242,867 | -121,214,335 |
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