A:
Positive:
1 x 12125710717 x 713277119 x 638195383 x 1460929323 x 3754091411 x 859371577 x 768914523 x 26809
Negative:
-1 x -121257107-17 x -7132771-19 x -6381953-83 x -1460929-323 x -375409-1411 x -85937-1577 x -76891-4523 x -26809
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 121,257,107, 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 | 121,257,107 | |
| -1 | -121,257,107 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,257,107.
Example:
1 x 121,257,107 = 121,257,107
and
-1 x -121,257,107 = 121,257,107
Notice both answers equal 121,257,107
With that explanation out of the way, let's continue. Next, we take the number 121,257,107 and divide it by 2:
121,257,107 ÷ 2 = 60,628,553.5
If the quotient is a whole number, then 2 and 60,628,553.5 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 | 121,257,107 | |
| -1 | -121,257,107 |
Now, we try dividing 121,257,107 by 3:
121,257,107 ÷ 3 = 40,419,035.6667
If the quotient is a whole number, then 3 and 40,419,035.6667 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 | 121,257,107 | |
| -1 | -121,257,107 |
Let's try dividing by 4:
121,257,107 ÷ 4 = 30,314,276.75
If the quotient is a whole number, then 4 and 30,314,276.75 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 | 121,257,107 | |
| -1 | 121,257,107 |
If you did it right, you will end up with this table:
| 1 | 17 | 19 | 83 | 323 | 1,411 | 1,577 | 4,523 | 26,809 | 76,891 | 85,937 | 375,409 | 1,460,929 | 6,381,953 | 7,132,771 | 121,257,107 |
| -1 | -17 | -19 | -83 | -323 | -1,411 | -1,577 | -4,523 | -26,809 | -76,891 | -85,937 | -375,409 | -1,460,929 | -6,381,953 | -7,132,771 | -121,257,107 |
Here are some more numbers to try:
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