import java.util.Scanner;

class Main{
	public static void main(String[] args) {
		try(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++;
				}
			}
			System.out.println(cnt);
		}
	}
}
