A:
Positive:
1 x 20656021717 x 1215060123 x 8980879103 x 2005439223 x 926279391 x 528287529 x 3904731751 x 1179672369 x 871933791 x 544875129 x 402738993 x 22969
Negative:
-1 x -206560217-17 x -12150601-23 x -8980879-103 x -2005439-223 x -926279-391 x -528287-529 x -390473-1751 x -117967-2369 x -87193-3791 x -54487-5129 x -40273-8993 x -22969
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 206,560,217, 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 | 206,560,217 | |
| -1 | -206,560,217 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 206,560,217.
Example:
1 x 206,560,217 = 206,560,217
and
-1 x -206,560,217 = 206,560,217
Notice both answers equal 206,560,217
With that explanation out of the way, let's continue. Next, we take the number 206,560,217 and divide it by 2:
206,560,217 ÷ 2 = 103,280,108.5
If the quotient is a whole number, then 2 and 103,280,108.5 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 | 206,560,217 | |
| -1 | -206,560,217 |
Now, we try dividing 206,560,217 by 3:
206,560,217 ÷ 3 = 68,853,405.6667
If the quotient is a whole number, then 3 and 68,853,405.6667 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 | 206,560,217 | |
| -1 | -206,560,217 |
Let's try dividing by 4:
206,560,217 ÷ 4 = 51,640,054.25
If the quotient is a whole number, then 4 and 51,640,054.25 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 | 206,560,217 | |
| -1 | 206,560,217 |
If you did it right, you will end up with this table:
| 1 | 17 | 23 | 103 | 223 | 391 | 529 | 1,751 | 2,369 | 3,791 | 5,129 | 8,993 | 22,969 | 40,273 | 54,487 | 87,193 | 117,967 | 390,473 | 528,287 | 926,279 | 2,005,439 | 8,980,879 | 12,150,601 | 206,560,217 |
| -1 | -17 | -23 | -103 | -223 | -391 | -529 | -1,751 | -2,369 | -3,791 | -5,129 | -8,993 | -22,969 | -40,273 | -54,487 | -87,193 | -117,967 | -390,473 | -528,287 | -926,279 | -2,005,439 | -8,980,879 | -12,150,601 | -206,560,217 |
Here are some more numbers to try:
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