A:
Positive:
1 x 12156338929 x 419184137 x 3285497277 x 438857409 x 2972211073 x 1132938033 x 1513310249 x 11861
Negative:
-1 x -121563389-29 x -4191841-37 x -3285497-277 x -438857-409 x -297221-1073 x -113293-8033 x -15133-10249 x -11861
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 121,563,389, 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 | 121,563,389 | |
| -1 | -121,563,389 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,563,389.
Example:
1 x 121,563,389 = 121,563,389
and
-1 x -121,563,389 = 121,563,389
Notice both answers equal 121,563,389
With that explanation out of the way, let's continue. Next, we take the number 121,563,389 and divide it by 2:
121,563,389 ÷ 2 = 60,781,694.5
If the quotient is a whole number, then 2 and 60,781,694.5 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 | 121,563,389 | |
| -1 | -121,563,389 |
Now, we try dividing 121,563,389 by 3:
121,563,389 ÷ 3 = 40,521,129.6667
If the quotient is a whole number, then 3 and 40,521,129.6667 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 | 121,563,389 | |
| -1 | -121,563,389 |
Let's try dividing by 4:
121,563,389 ÷ 4 = 30,390,847.25
If the quotient is a whole number, then 4 and 30,390,847.25 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 | 121,563,389 | |
| -1 | 121,563,389 |
If you did it right, you will end up with this table:
| 1 | 29 | 37 | 277 | 409 | 1,073 | 8,033 | 10,249 | 11,861 | 15,133 | 113,293 | 297,221 | 438,857 | 3,285,497 | 4,191,841 | 121,563,389 |
| -1 | -29 | -37 | -277 | -409 | -1,073 | -8,033 | -10,249 | -11,861 | -15,133 | -113,293 | -297,221 | -438,857 | -3,285,497 | -4,191,841 | -121,563,389 |
Here are some more numbers to try:
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