import java.io.*;

class Main{
    public static void main(String[] args) throws IOException{
        
        int x, y, z;
        int count = 0;
        
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str[] = br.readline().split(" ");
        
        x = Integer.parseInt(str[0]);
        y = Integer.parseInt(str[1]);
        z = Integer.parseInt(str[2]);
        
        for(int i=x; i<=y; i++){
            if(z%i == 0){
                count++;
            }
        }
        System.out.println(count);
    }
}