A:
Positive:
1 x 1215403455 x 2430806967 x 1814035335 x 362807461 x 263645787 x 1544352305 x 527293935 x 30887
Negative:
-1 x -121540345-5 x -24308069-67 x -1814035-335 x -362807-461 x -263645-787 x -154435-2305 x -52729-3935 x -30887
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 121,540,345, 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 | 121,540,345 | |
| -1 | -121,540,345 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,540,345.
Example:
1 x 121,540,345 = 121,540,345
and
-1 x -121,540,345 = 121,540,345
Notice both answers equal 121,540,345
With that explanation out of the way, let's continue. Next, we take the number 121,540,345 and divide it by 2:
121,540,345 ÷ 2 = 60,770,172.5
If the quotient is a whole number, then 2 and 60,770,172.5 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 | 121,540,345 | |
| -1 | -121,540,345 |
Now, we try dividing 121,540,345 by 3:
121,540,345 ÷ 3 = 40,513,448.3333
If the quotient is a whole number, then 3 and 40,513,448.3333 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 | 121,540,345 | |
| -1 | -121,540,345 |
Let's try dividing by 4:
121,540,345 ÷ 4 = 30,385,086.25
If the quotient is a whole number, then 4 and 30,385,086.25 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 | 121,540,345 | |
| -1 | 121,540,345 |
If you did it right, you will end up with this table:
| 1 | 5 | 67 | 335 | 461 | 787 | 2,305 | 3,935 | 30,887 | 52,729 | 154,435 | 263,645 | 362,807 | 1,814,035 | 24,308,069 | 121,540,345 |
| -1 | -5 | -67 | -335 | -461 | -787 | -2,305 | -3,935 | -30,887 | -52,729 | -154,435 | -263,645 | -362,807 | -1,814,035 | -24,308,069 | -121,540,345 |
Here are some more numbers to try:
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