import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		StringBuilder builder = new StringBuilder();

		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 += 1;
			}
		}
		System.out.println(builder.append(count));
		

	}

}
/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