A:
Positive:
1 x 1213067155 x 2426134323 x 5274205115 x 1054841907 x 1337451163 x 1043054535 x 267495815 x 20861
Negative:
-1 x -121306715-5 x -24261343-23 x -5274205-115 x -1054841-907 x -133745-1163 x -104305-4535 x -26749-5815 x -20861
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 121,306,715, 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 | 121,306,715 | |
| -1 | -121,306,715 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,306,715.
Example:
1 x 121,306,715 = 121,306,715
and
-1 x -121,306,715 = 121,306,715
Notice both answers equal 121,306,715
With that explanation out of the way, let's continue. Next, we take the number 121,306,715 and divide it by 2:
121,306,715 ÷ 2 = 60,653,357.5
If the quotient is a whole number, then 2 and 60,653,357.5 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 | 121,306,715 | |
| -1 | -121,306,715 |
Now, we try dividing 121,306,715 by 3:
121,306,715 ÷ 3 = 40,435,571.6667
If the quotient is a whole number, then 3 and 40,435,571.6667 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 | 121,306,715 | |
| -1 | -121,306,715 |
Let's try dividing by 4:
121,306,715 ÷ 4 = 30,326,678.75
If the quotient is a whole number, then 4 and 30,326,678.75 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 | 121,306,715 | |
| -1 | 121,306,715 |
If you did it right, you will end up with this table:
| 1 | 5 | 23 | 115 | 907 | 1,163 | 4,535 | 5,815 | 20,861 | 26,749 | 104,305 | 133,745 | 1,054,841 | 5,274,205 | 24,261,343 | 121,306,715 |
| -1 | -5 | -23 | -115 | -907 | -1,163 | -4,535 | -5,815 | -20,861 | -26,749 | -104,305 | -133,745 | -1,054,841 | -5,274,205 | -24,261,343 | -121,306,715 |
Here are some more numbers to try:
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