import java.util.Scanner;

public class Main {
	void run(){
		Scanner s = new Scanner(System.in);
		int a = s.nextInt();
		int b = s.nextInt();
		int c = s.nextInt();
		int count = 0;
		for(int i = a; i <= b; i++){
	        if(c % i == 0) count++; 
		}
		System.out.println(count);
	}
	
	public static void main(String[] args) {
		/* 
		 * Main x;
		 * x = new Main();
		 * x.run();
		 * ??¨????????????
		 */
		new Main().run();
		
	}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz