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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. int divisors(unsigned long long int n){
  5. 	unsigned long long int l = (unsigned long long int)sqrt(n);
  6. 	int c=0;
  7. 	for(unsigned long long int i=1;i<=l;i++){
  8. 		if((n%i)==0) {
  9. 			c++;
  10. 			if(i!=(n/i)) 
  11. 				c++;
  12. 		}
  13.  
  14. 	}
  15. 	return c;
  16. }
  17.  
  18. int main(void) {
  19. 	 unsigned long long int n = 1;
  20.      unsigned long long int d = 1;
  21. 	printf("%d\n",divisors(5));
  22.     while (divisors(d) <= 500) {
  23.         n++;
  24.         d+= n;
  25.     }
  26.     printf("%llu\n",d);
  27. }
  28.  
Success #stdin #stdout 0.41s 4392KB
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https://ideone.com/KIANZw
language:
C (gcc 8.3)
created:
4 years ago
visibility:
public

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