import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
	int a,b,c,s=0;
	Scanner scan = new Scanner(System.in);
	
	a= Integer.parseInt(scan.next());
	b= Integer.parseInt(scan.next());
	c= Integer.parseInt(scan.next());

	for(;a<=b;a++) {
		if(c%a==0)
			s++;
	}
	System.out.println(s);
	}
	
}
/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