A:
Positive:
1 x 1215636177 x 1736623117 x 715080131 x 3921407119 x 1021543217 x 560201527 x 230671961 x 1264971063 x 1143593689 x 329536727 x 180717441 x 16337
Negative:
-1 x -121563617-7 x -17366231-17 x -7150801-31 x -3921407-119 x -1021543-217 x -560201-527 x -230671-961 x -126497-1063 x -114359-3689 x -32953-6727 x -18071-7441 x -16337
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 121,563,617, 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 | 121,563,617 | |
| -1 | -121,563,617 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 121,563,617.
Example:
1 x 121,563,617 = 121,563,617
and
-1 x -121,563,617 = 121,563,617
Notice both answers equal 121,563,617
With that explanation out of the way, let's continue. Next, we take the number 121,563,617 and divide it by 2:
121,563,617 ÷ 2 = 60,781,808.5
If the quotient is a whole number, then 2 and 60,781,808.5 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 | 121,563,617 | |
| -1 | -121,563,617 |
Now, we try dividing 121,563,617 by 3:
121,563,617 ÷ 3 = 40,521,205.6667
If the quotient is a whole number, then 3 and 40,521,205.6667 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 | 121,563,617 | |
| -1 | -121,563,617 |
Let's try dividing by 4:
121,563,617 ÷ 4 = 30,390,904.25
If the quotient is a whole number, then 4 and 30,390,904.25 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 | 121,563,617 | |
| -1 | 121,563,617 |
If you did it right, you will end up with this table:
| 1 | 7 | 17 | 31 | 119 | 217 | 527 | 961 | 1,063 | 3,689 | 6,727 | 7,441 | 16,337 | 18,071 | 32,953 | 114,359 | 126,497 | 230,671 | 560,201 | 1,021,543 | 3,921,407 | 7,150,801 | 17,366,231 | 121,563,617 |
| -1 | -7 | -17 | -31 | -119 | -217 | -527 | -961 | -1,063 | -3,689 | -6,727 | -7,441 | -16,337 | -18,071 | -32,953 | -114,359 | -126,497 | -230,671 | -560,201 | -1,021,543 | -3,921,407 | -7,150,801 | -17,366,231 | -121,563,617 |
Here are some more numbers to try:
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