A:
Positive:
1 x 2002133913 x 154010323 x 87049329 x 690391299 x 66961377 x 53107667 x 300172309 x 8671
Negative:
-1 x -20021339-13 x -1540103-23 x -870493-29 x -690391-299 x -66961-377 x -53107-667 x -30017-2309 x -8671
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 20,021,339, 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 | 20,021,339 | |
| -1 | -20,021,339 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,021,339.
Example:
1 x 20,021,339 = 20,021,339
and
-1 x -20,021,339 = 20,021,339
Notice both answers equal 20,021,339
With that explanation out of the way, let's continue. Next, we take the number 20,021,339 and divide it by 2:
20,021,339 ÷ 2 = 10,010,669.5
If the quotient is a whole number, then 2 and 10,010,669.5 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 | 20,021,339 | |
| -1 | -20,021,339 |
Now, we try dividing 20,021,339 by 3:
20,021,339 ÷ 3 = 6,673,779.6667
If the quotient is a whole number, then 3 and 6,673,779.6667 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 | 20,021,339 | |
| -1 | -20,021,339 |
Let's try dividing by 4:
20,021,339 ÷ 4 = 5,005,334.75
If the quotient is a whole number, then 4 and 5,005,334.75 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 | 20,021,339 | |
| -1 | 20,021,339 |
If you did it right, you will end up with this table:
| 1 | 13 | 23 | 29 | 299 | 377 | 667 | 2,309 | 8,671 | 30,017 | 53,107 | 66,961 | 690,391 | 870,493 | 1,540,103 | 20,021,339 |
| -1 | -13 | -23 | -29 | -299 | -377 | -667 | -2,309 | -8,671 | -30,017 | -53,107 | -66,961 | -690,391 | -870,493 | -1,540,103 | -20,021,339 |
Here are some more numbers to try:
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