A:
Positive:
1 x 200422455 x 400844919 x 105485595 x 210971113 x 177365565 x 354731867 x 107352147 x 9335
Negative:
-1 x -20042245-5 x -4008449-19 x -1054855-95 x -210971-113 x -177365-565 x -35473-1867 x -10735-2147 x -9335
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 20,042,245, 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 | 20,042,245 | |
| -1 | -20,042,245 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,042,245.
Example:
1 x 20,042,245 = 20,042,245
and
-1 x -20,042,245 = 20,042,245
Notice both answers equal 20,042,245
With that explanation out of the way, let's continue. Next, we take the number 20,042,245 and divide it by 2:
20,042,245 ÷ 2 = 10,021,122.5
If the quotient is a whole number, then 2 and 10,021,122.5 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 | 20,042,245 | |
| -1 | -20,042,245 |
Now, we try dividing 20,042,245 by 3:
20,042,245 ÷ 3 = 6,680,748.3333
If the quotient is a whole number, then 3 and 6,680,748.3333 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 | 20,042,245 | |
| -1 | -20,042,245 |
Let's try dividing by 4:
20,042,245 ÷ 4 = 5,010,561.25
If the quotient is a whole number, then 4 and 5,010,561.25 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 | 20,042,245 | |
| -1 | 20,042,245 |
If you did it right, you will end up with this table:
| 1 | 5 | 19 | 95 | 113 | 565 | 1,867 | 2,147 | 9,335 | 10,735 | 35,473 | 177,365 | 210,971 | 1,054,855 | 4,008,449 | 20,042,245 |
| -1 | -5 | -19 | -95 | -113 | -565 | -1,867 | -2,147 | -9,335 | -10,735 | -35,473 | -177,365 | -210,971 | -1,054,855 | -4,008,449 | -20,042,245 |
Here are some more numbers to try:
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