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