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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. //Code tot hon => chay nhanh hon, it vong lap hon
  5. int tonguoc2(int n){
  6. 	int sum = 0;
  7. 	for(int i = 1; i <= sqrt(n); i++){
  8. 		if(n % i == 0){
  9. 			sum += i;
  10. 			// i => n / i
  11. 			if(i != n / i){
  12. 				sum += n / i;
  13. 			}
  14. 		}
  15. 	}
  16. 	return sum;
  17. }
  18.  
  19. int demuoc(int n){
  20. 	int ans = 0;
  21. 	for(int i = 1; i <= sqrt(n); i++){
  22. 		if(n % i == 0){
  23. 			++ans;
  24. 			if(i != n / i){
  25. 				++ans;
  26. 			}
  27. 		}
  28. 	}
  29. 	return ans;
  30. }
  31.  
  32. int main(){
  33. 	int n; cin >> n;
  34. 	cout << tonguoc2(n) << endl;
  35. }
Success #stdin #stdout 0s 5296KB
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Standard input is empty
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57344
https://ideone.com/g6A6Md
language:
C++14 (gcc 8.3)
created:
29 days ago
visibility:
public

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