import java.util.Scanner;
class sMain {
	@SuppressWarnings("resource")
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int a = scan.nextInt();
		int b = scan.nextInt();
		int c = scan.nextInt();
		int ans = 0;
		
		for(int i=a;i<=b;i++){
	        if(c%i==0) ans++;
	    }
		System.out.println(ans);
	}
}