A:
Positive:
1 x 2001310311 x 181937329 x 69010743 x 465421319 x 62737473 x 423111247 x 160491459 x 13717
Negative:
-1 x -20013103-11 x -1819373-29 x -690107-43 x -465421-319 x -62737-473 x -42311-1247 x -16049-1459 x -13717
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 20,013,103, 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 | 20,013,103 | |
| -1 | -20,013,103 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,013,103.
Example:
1 x 20,013,103 = 20,013,103
and
-1 x -20,013,103 = 20,013,103
Notice both answers equal 20,013,103
With that explanation out of the way, let's continue. Next, we take the number 20,013,103 and divide it by 2:
20,013,103 ÷ 2 = 10,006,551.5
If the quotient is a whole number, then 2 and 10,006,551.5 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 | 20,013,103 | |
| -1 | -20,013,103 |
Now, we try dividing 20,013,103 by 3:
20,013,103 ÷ 3 = 6,671,034.3333
If the quotient is a whole number, then 3 and 6,671,034.3333 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 | 20,013,103 | |
| -1 | -20,013,103 |
Let's try dividing by 4:
20,013,103 ÷ 4 = 5,003,275.75
If the quotient is a whole number, then 4 and 5,003,275.75 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 | 20,013,103 | |
| -1 | 20,013,103 |
If you did it right, you will end up with this table:
| 1 | 11 | 29 | 43 | 319 | 473 | 1,247 | 1,459 | 13,717 | 16,049 | 42,311 | 62,737 | 465,421 | 690,107 | 1,819,373 | 20,013,103 |
| -1 | -11 | -29 | -43 | -319 | -473 | -1,247 | -1,459 | -13,717 | -16,049 | -42,311 | -62,737 | -465,421 | -690,107 | -1,819,373 | -20,013,103 |
Here are some more numbers to try:
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