A:
Positive:
1 x 207388097 x 296268713 x 159529349 x 42324191 x 227899343 x 60463637 x 325574459 x 4651
Negative:
-1 x -20738809-7 x -2962687-13 x -1595293-49 x -423241-91 x -227899-343 x -60463-637 x -32557-4459 x -4651
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 20,738,809, 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 | 20,738,809 | |
| -1 | -20,738,809 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,738,809.
Example:
1 x 20,738,809 = 20,738,809
and
-1 x -20,738,809 = 20,738,809
Notice both answers equal 20,738,809
With that explanation out of the way, let's continue. Next, we take the number 20,738,809 and divide it by 2:
20,738,809 ÷ 2 = 10,369,404.5
If the quotient is a whole number, then 2 and 10,369,404.5 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 | 20,738,809 | |
| -1 | -20,738,809 |
Now, we try dividing 20,738,809 by 3:
20,738,809 ÷ 3 = 6,912,936.3333
If the quotient is a whole number, then 3 and 6,912,936.3333 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 | 20,738,809 | |
| -1 | -20,738,809 |
Let's try dividing by 4:
20,738,809 ÷ 4 = 5,184,702.25
If the quotient is a whole number, then 4 and 5,184,702.25 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 | 20,738,809 | |
| -1 | 20,738,809 |
If you did it right, you will end up with this table:
| 1 | 7 | 13 | 49 | 91 | 343 | 637 | 4,459 | 4,651 | 32,557 | 60,463 | 227,899 | 423,241 | 1,595,293 | 2,962,687 | 20,738,809 |
| -1 | -7 | -13 | -49 | -91 | -343 | -637 | -4,459 | -4,651 | -32,557 | -60,463 | -227,899 | -423,241 | -1,595,293 | -2,962,687 | -20,738,809 |
Here are some more numbers to try:
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