A:
Positive:
1 x 203211197 x 290301713 x 156316391 x 223309107 x 189917749 x 271311391 x 146092087 x 9737
Negative:
-1 x -20321119-7 x -2903017-13 x -1563163-91 x -223309-107 x -189917-749 x -27131-1391 x -14609-2087 x -9737
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 20,321,119, 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 | 20,321,119 | |
| -1 | -20,321,119 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,321,119.
Example:
1 x 20,321,119 = 20,321,119
and
-1 x -20,321,119 = 20,321,119
Notice both answers equal 20,321,119
With that explanation out of the way, let's continue. Next, we take the number 20,321,119 and divide it by 2:
20,321,119 ÷ 2 = 10,160,559.5
If the quotient is a whole number, then 2 and 10,160,559.5 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 | 20,321,119 | |
| -1 | -20,321,119 |
Now, we try dividing 20,321,119 by 3:
20,321,119 ÷ 3 = 6,773,706.3333
If the quotient is a whole number, then 3 and 6,773,706.3333 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 | 20,321,119 | |
| -1 | -20,321,119 |
Let's try dividing by 4:
20,321,119 ÷ 4 = 5,080,279.75
If the quotient is a whole number, then 4 and 5,080,279.75 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 | 20,321,119 | |
| -1 | 20,321,119 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 91 | 107 | 749 | 1,391 | 2,087 | 9,737 | 14,609 | 27,131 | 189,917 | 223,309 | 1,563,163 | 2,903,017 | 20,321,119 |
| -1 | -7 | -13 | -91 | -107 | -749 | -1,391 | -2,087 | -9,737 | -14,609 | -27,131 | -189,917 | -223,309 | -1,563,163 | -2,903,017 | -20,321,119 |
Here are some more numbers to try:
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