A:
Positive:
1 x 2002012111 x 182001129 x 69034997 x 206393319 x 62759647 x 309431067 x 187632813 x 7117
Negative:
-1 x -20020121-11 x -1820011-29 x -690349-97 x -206393-319 x -62759-647 x -30943-1067 x -18763-2813 x -7117
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 20,020,121, 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 | 20,020,121 | |
| -1 | -20,020,121 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,020,121.
Example:
1 x 20,020,121 = 20,020,121
and
-1 x -20,020,121 = 20,020,121
Notice both answers equal 20,020,121
With that explanation out of the way, let's continue. Next, we take the number 20,020,121 and divide it by 2:
20,020,121 ÷ 2 = 10,010,060.5
If the quotient is a whole number, then 2 and 10,010,060.5 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 | 20,020,121 | |
| -1 | -20,020,121 |
Now, we try dividing 20,020,121 by 3:
20,020,121 ÷ 3 = 6,673,373.6667
If the quotient is a whole number, then 3 and 6,673,373.6667 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 | 20,020,121 | |
| -1 | -20,020,121 |
Let's try dividing by 4:
20,020,121 ÷ 4 = 5,005,030.25
If the quotient is a whole number, then 4 and 5,005,030.25 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 | 20,020,121 | |
| -1 | 20,020,121 |
If you did it right, you will end up with this table:
| 1 | 11 | 29 | 97 | 319 | 647 | 1,067 | 2,813 | 7,117 | 18,763 | 30,943 | 62,759 | 206,393 | 690,349 | 1,820,011 | 20,020,121 |
| -1 | -11 | -29 | -97 | -319 | -647 | -1,067 | -2,813 | -7,117 | -18,763 | -30,943 | -62,759 | -206,393 | -690,349 | -1,820,011 | -20,020,121 |
Here are some more numbers to try:
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