A:
Positive:
1 x 203720097 x 291028719 x 107221147 x 433447133 x 153173329 x 61921893 x 228133259 x 6251
Negative:
-1 x -20372009-7 x -2910287-19 x -1072211-47 x -433447-133 x -153173-329 x -61921-893 x -22813-3259 x -6251
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 20,372,009, 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 | 20,372,009 | |
| -1 | -20,372,009 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 20,372,009.
Example:
1 x 20,372,009 = 20,372,009
and
-1 x -20,372,009 = 20,372,009
Notice both answers equal 20,372,009
With that explanation out of the way, let's continue. Next, we take the number 20,372,009 and divide it by 2:
20,372,009 ÷ 2 = 10,186,004.5
If the quotient is a whole number, then 2 and 10,186,004.5 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 | 20,372,009 | |
| -1 | -20,372,009 |
Now, we try dividing 20,372,009 by 3:
20,372,009 ÷ 3 = 6,790,669.6667
If the quotient is a whole number, then 3 and 6,790,669.6667 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 | 20,372,009 | |
| -1 | -20,372,009 |
Let's try dividing by 4:
20,372,009 ÷ 4 = 5,093,002.25
If the quotient is a whole number, then 4 and 5,093,002.25 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 | 20,372,009 | |
| -1 | 20,372,009 |
If you did it right, you will end up with this table:
| 1 | 7 | 19 | 47 | 133 | 329 | 893 | 3,259 | 6,251 | 22,813 | 61,921 | 153,173 | 433,447 | 1,072,211 | 2,910,287 | 20,372,009 |
| -1 | -7 | -19 | -47 | -133 | -329 | -893 | -3,259 | -6,251 | -22,813 | -61,921 | -153,173 | -433,447 | -1,072,211 | -2,910,287 | -20,372,009 |
Here are some more numbers to try:
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