#include<stdio.h>
#include<math.h>
int main(){
long long n;
long long sum=0;
for(long long i
=1;i
<=sqrt(n
);i
++){ if(n%i==0){
if(i!=n/i){
sum=sum+i+n/i;
}
else{
sum=sum+i;
}
}
}
}
I2luY2x1ZGU8c3RkaW8uaD4KI2luY2x1ZGU8bWF0aC5oPgppbnQgbWFpbigpewoJbG9uZyBsb25nICBuOwoJc2NhbmYoIiVsbGQiLCZuKTsKCWxvbmcgbG9uZyBzdW09MDsKCWZvcihsb25nIGxvbmcgIGk9MTtpPD1zcXJ0KG4pO2krKyl7CgkJaWYobiVpPT0wKXsKCQkJaWYoaSE9bi9pKXsKCQkJCXN1bT1zdW0raStuL2k7CgkJCX0KCQkJZWxzZXsKCQkJCXN1bT1zdW0raTsKCQkJfQoJCX0KCX0KCXByaW50ZigiJWxsZCIsc3VtKTsKfQ==