import java.util.Scanner;

public class Main{
	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 counter=0;
		
		for(int i=a;i<=b;i++){
			if(c%i==0){
				counter++;
			}
		}
		System.out.println(counter);
		scan.close();
	}
}
/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