题解

#include <bits/stdc++.h>
using namespace std;
int a,b;
int yinzihe(int a,int b){
for(int i=1;i<=a;i++){
if(a%i==0)
b+=i;
}
return b;
}
int main(){
cin>>a;
cout<<yinzihe(a,b)<<endl;
}