import java.util.Scanner;

public class Main {
	public static void main(String[] args) {

		Scanner scanner = new Scanner(System.in);

		 int a = scanner.nextInt();
		 int b = scanner.nextInt();
		 int c = scanner.nextInt();

		 int count = 0;

		 /*
		 if(a == b){
			 if(b == c){
				 count++;
			 }
		 }
		 */

		 while(a<=b){
			 if(0 == (c % a)){
				 count++;
				 a++;
			 }else{
				 a++;
			 }
		 }

		 System.out.println(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