import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    
	int a = sc.nextInt();
	int b = sc.nextInt();
	int c = sc.nextInt();
        int cnt = 0;

	for(int i = a; i <= b; i++ ){
		if(c % i == 0){
			cnt += 1;

			
		}
		
	}
	System.out.println(cnt);
  }
	


}