A:
Positive:
1 x 207050155 x 414100337 x 559595185 x 111919
Negative:
-1 x -20705015-5 x -4141003-37 x -559595-185 x -111919
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 20,705,015, 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 | 20,705,015 | |
| -1 | -20,705,015 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,705,015.
Example:
1 x 20,705,015 = 20,705,015
and
-1 x -20,705,015 = 20,705,015
Notice both answers equal 20,705,015
With that explanation out of the way, let's continue. Next, we take the number 20,705,015 and divide it by 2:
20,705,015 ÷ 2 = 10,352,507.5
If the quotient is a whole number, then 2 and 10,352,507.5 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 | 20,705,015 | |
| -1 | -20,705,015 |
Now, we try dividing 20,705,015 by 3:
20,705,015 ÷ 3 = 6,901,671.6667
If the quotient is a whole number, then 3 and 6,901,671.6667 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 | 20,705,015 | |
| -1 | -20,705,015 |
Let's try dividing by 4:
20,705,015 ÷ 4 = 5,176,253.75
If the quotient is a whole number, then 4 and 5,176,253.75 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 | 20,705,015 | |
| -1 | 20,705,015 |
If you did it right, you will end up with this table:
| 1 | 5 | 37 | 185 | 111,919 | 559,595 | 4,141,003 | 20,705,015 |
| -1 | -5 | -37 | -185 | -111,919 | -559,595 | -4,141,003 | -20,705,015 |
Here are some more numbers to try:
Try the factor calculator