A:
Positive:
1 x 206674855 x 413349741 x 504085181 x 114185205 x 100817557 x 37105905 x 228372785 x 7421
Negative:
-1 x -20667485-5 x -4133497-41 x -504085-181 x -114185-205 x -100817-557 x -37105-905 x -22837-2785 x -7421
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 20,667,485, 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 | 20,667,485 | |
| -1 | -20,667,485 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,667,485.
Example:
1 x 20,667,485 = 20,667,485
and
-1 x -20,667,485 = 20,667,485
Notice both answers equal 20,667,485
With that explanation out of the way, let's continue. Next, we take the number 20,667,485 and divide it by 2:
20,667,485 ÷ 2 = 10,333,742.5
If the quotient is a whole number, then 2 and 10,333,742.5 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 | 20,667,485 | |
| -1 | -20,667,485 |
Now, we try dividing 20,667,485 by 3:
20,667,485 ÷ 3 = 6,889,161.6667
If the quotient is a whole number, then 3 and 6,889,161.6667 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 | 20,667,485 | |
| -1 | -20,667,485 |
Let's try dividing by 4:
20,667,485 ÷ 4 = 5,166,871.25
If the quotient is a whole number, then 4 and 5,166,871.25 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 | 20,667,485 | |
| -1 | 20,667,485 |
If you did it right, you will end up with this table:
| 1 | 5 | 41 | 181 | 205 | 557 | 905 | 2,785 | 7,421 | 22,837 | 37,105 | 100,817 | 114,185 | 504,085 | 4,133,497 | 20,667,485 |
| -1 | -5 | -41 | -181 | -205 | -557 | -905 | -2,785 | -7,421 | -22,837 | -37,105 | -100,817 | -114,185 | -504,085 | -4,133,497 | -20,667,485 |
Here are some more numbers to try:
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