A:
Positive:
1 x 2071111911 x 188282913 x 1593163143 x 144833169 x 122551857 x 241671859 x 111412197 x 9427
Negative:
-1 x -20711119-11 x -1882829-13 x -1593163-143 x -144833-169 x -122551-857 x -24167-1859 x -11141-2197 x -9427
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 20,711,119, 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 | 20,711,119 | |
| -1 | -20,711,119 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,711,119.
Example:
1 x 20,711,119 = 20,711,119
and
-1 x -20,711,119 = 20,711,119
Notice both answers equal 20,711,119
With that explanation out of the way, let's continue. Next, we take the number 20,711,119 and divide it by 2:
20,711,119 ÷ 2 = 10,355,559.5
If the quotient is a whole number, then 2 and 10,355,559.5 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 | 20,711,119 | |
| -1 | -20,711,119 |
Now, we try dividing 20,711,119 by 3:
20,711,119 ÷ 3 = 6,903,706.3333
If the quotient is a whole number, then 3 and 6,903,706.3333 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 | 20,711,119 | |
| -1 | -20,711,119 |
Let's try dividing by 4:
20,711,119 ÷ 4 = 5,177,779.75
If the quotient is a whole number, then 4 and 5,177,779.75 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 | 20,711,119 | |
| -1 | 20,711,119 |
If you did it right, you will end up with this table:
| 1 | 11 | 13 | 143 | 169 | 857 | 1,859 | 2,197 | 9,427 | 11,141 | 24,167 | 122,551 | 144,833 | 1,593,163 | 1,882,829 | 20,711,119 |
| -1 | -11 | -13 | -143 | -169 | -857 | -1,859 | -2,197 | -9,427 | -11,141 | -24,167 | -122,551 | -144,833 | -1,593,163 | -1,882,829 | -20,711,119 |
Here are some more numbers to try:
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