import java.io.*;
import java.util.*;

public class Main {
	public static void main (String[] args){
	Scanner sc=new Scanner(new InputStreamReader(System.in));
	int a=sc.nextInt();
	int b=sc.nextInt();
	int c=sc.nextInt();
	sc.close();
	int x=0;
	for(int i=a;i<=b;i++){
		if(c%i==0) x++;
	}
	System.out.println(x);
	}
}
/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