A:
Positive:
1 x 2065315217 x 2950450317 x 1214891337 x 558193349 x 4214929119 x 1735559259 x 797419629 x 328349833 x 2479371813 x 1139174403 x 469076701 x 30821
Negative:
-1 x -206531521-7 x -29504503-17 x -12148913-37 x -5581933-49 x -4214929-119 x -1735559-259 x -797419-629 x -328349-833 x -247937-1813 x -113917-4403 x -46907-6701 x -30821
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 206,531,521, 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 | 206,531,521 | |
| -1 | -206,531,521 |
When you multiply two negative numbers together, you get a positive number. That means both the positive and negative numbers are factors of 206,531,521.
Example:
1 x 206,531,521 = 206,531,521
and
-1 x -206,531,521 = 206,531,521
Notice both answers equal 206,531,521
With that explanation out of the way, let's continue. Next, we take the number 206,531,521 and divide it by 2:
206,531,521 ÷ 2 = 103,265,760.5
If the quotient is a whole number, then 2 and 103,265,760.5 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 | 206,531,521 | |
| -1 | -206,531,521 |
Now, we try dividing 206,531,521 by 3:
206,531,521 ÷ 3 = 68,843,840.3333
If the quotient is a whole number, then 3 and 68,843,840.3333 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 | 206,531,521 | |
| -1 | -206,531,521 |
Let's try dividing by 4:
206,531,521 ÷ 4 = 51,632,880.25
If the quotient is a whole number, then 4 and 51,632,880.25 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 | 206,531,521 | |
| -1 | 206,531,521 |
If you did it right, you will end up with this table:
| 1 | 7 | 17 | 37 | 49 | 119 | 259 | 629 | 833 | 1,813 | 4,403 | 6,701 | 30,821 | 46,907 | 113,917 | 247,937 | 328,349 | 797,419 | 1,735,559 | 4,214,929 | 5,581,933 | 12,148,913 | 29,504,503 | 206,531,521 |
| -1 | -7 | -17 | -37 | -49 | -119 | -259 | -629 | -833 | -1,813 | -4,403 | -6,701 | -30,821 | -46,907 | -113,917 | -247,937 | -328,349 | -797,419 | -1,735,559 | -4,214,929 | -5,581,933 | -12,148,913 | -29,504,503 | -206,531,521 |
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