Navidur went to the carnival and played the stereotypical hit something with a big hammer as hard as you can. When he hit the platform, the puck flew up exactly meters. Now, the carnival is actually hosted by Mr. White, so the scoring is a little strange this time around. Navidur's score is the sum of all the positive factors of . What's his score?
Input Specification
The input will be a single integer .
Output Specification
Output the sum of the positive factors of .
Sample Input
27
Sample Output
40
Comments
The number its self is a factor (I made that mistake)