import java.io.*;

class Main {
    public static void main(String[] args) {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str = br.readLine();
        String[] strs = str.split(" ");
        int a = Integer.parseInt(strs[0]);
        int b = Integer.parseInt(strs[1]);
        int c = Integer.parseInt(strs[2]);
        int count = 0;
        for (int i =a; i <= b; i++) {
            if ((c % i) == 0){
                count++;
            }
        }
        System.out.println(count);
        br.close();
    }
}