import java.util.Scanner;

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 count = 0;
	
	for(int i = a; i <= b; i++){
		if(c % i == 0){
			count++;
		}
	}
	System.out.println(count);
	sc.close();
	}
}
