#include<bits/stdc++.h>
using namespace std;

int main(){
  int a,b,c;  
  cin>>a>>b>>c;
    
  int cnt = 0;  
  for(int x = a; x <= b; x++);{
       if(c % x == 0) cnt++;
    }
 
    cout<<cnt<<endl;
}
    
