import java.util.*;
public class Main{
public static void main(String[] args){
Scanner sc=new Scanner(System.in);
while(sc.hasNext()){
int n=sc.nextInt();
int count=0;
for(int i=1;i<=n;i++){
int sum=0;
for(int j=1;j<=i/2;j++){
if(i%j==0){
sum+=j;
}
}
if(sum==i){
count++;
}
}
System.out.println(count);
}
}
}