A:
Positive:
1 x 201999955 x 403999917 x 118823585 x 237647107 x 188785535 x 377571819 x 111052221 x 9095
Negative:
-1 x -20199995-5 x -4039999-17 x -1188235-85 x -237647-107 x -188785-535 x -37757-1819 x -11105-2221 x -9095
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 20,199,995, 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 | 20,199,995 | |
| -1 | -20,199,995 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,199,995.
Example:
1 x 20,199,995 = 20,199,995
and
-1 x -20,199,995 = 20,199,995
Notice both answers equal 20,199,995
With that explanation out of the way, let's continue. Next, we take the number 20,199,995 and divide it by 2:
20,199,995 ÷ 2 = 10,099,997.5
If the quotient is a whole number, then 2 and 10,099,997.5 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 | 20,199,995 | |
| -1 | -20,199,995 |
Now, we try dividing 20,199,995 by 3:
20,199,995 ÷ 3 = 6,733,331.6667
If the quotient is a whole number, then 3 and 6,733,331.6667 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 | 20,199,995 | |
| -1 | -20,199,995 |
Let's try dividing by 4:
20,199,995 ÷ 4 = 5,049,998.75
If the quotient is a whole number, then 4 and 5,049,998.75 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 | 20,199,995 | |
| -1 | 20,199,995 |
If you did it right, you will end up with this table:
| 1 | 5 | 17 | 85 | 107 | 535 | 1,819 | 2,221 | 9,095 | 11,105 | 37,757 | 188,785 | 237,647 | 1,188,235 | 4,039,999 | 20,199,995 |
| -1 | -5 | -17 | -85 | -107 | -535 | -1,819 | -2,221 | -9,095 | -11,105 | -37,757 | -188,785 | -237,647 | -1,188,235 | -4,039,999 | -20,199,995 |
Here are some more numbers to try:
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