A:
Positive:
1 x 1212488055 x 2424976179 x 1534795127 x 954715395 x 306959635 x 1909432417 x 5016510033 x 12085
Negative:
-1 x -121248805-5 x -24249761-79 x -1534795-127 x -954715-395 x -306959-635 x -190943-2417 x -50165-10033 x -12085
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 121,248,805, 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 | 121,248,805 | |
| -1 | -121,248,805 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,248,805.
Example:
1 x 121,248,805 = 121,248,805
and
-1 x -121,248,805 = 121,248,805
Notice both answers equal 121,248,805
With that explanation out of the way, let's continue. Next, we take the number 121,248,805 and divide it by 2:
121,248,805 ÷ 2 = 60,624,402.5
If the quotient is a whole number, then 2 and 60,624,402.5 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 | 121,248,805 | |
| -1 | -121,248,805 |
Now, we try dividing 121,248,805 by 3:
121,248,805 ÷ 3 = 40,416,268.3333
If the quotient is a whole number, then 3 and 40,416,268.3333 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 | 121,248,805 | |
| -1 | -121,248,805 |
Let's try dividing by 4:
121,248,805 ÷ 4 = 30,312,201.25
If the quotient is a whole number, then 4 and 30,312,201.25 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 | 121,248,805 | |
| -1 | 121,248,805 |
If you did it right, you will end up with this table:
| 1 | 5 | 79 | 127 | 395 | 635 | 2,417 | 10,033 | 12,085 | 50,165 | 190,943 | 306,959 | 954,715 | 1,534,795 | 24,249,761 | 121,248,805 |
| -1 | -5 | -79 | -127 | -395 | -635 | -2,417 | -10,033 | -12,085 | -50,165 | -190,943 | -306,959 | -954,715 | -1,534,795 | -24,249,761 | -121,248,805 |
Here are some more numbers to try:
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