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

}