import java.io.*;
public class Main{
	public static void main(String [] args) throws NumberFormatException, IOException{
		BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
		String[] st=br.readLine().split(" ");
		int a=Integer.parseInt(st[0]);
		int b=Integer.parseInt(st[1]);
		int c=Integer.parseInt(st[2]);
		int count=0;
		for(int i=a;i<=b;i++){
			if(c%i==0)count++;
		}System.out.println(count);
		}} import java.io.*; io.* java public class Main{
	public static void main(String [] args) throws NumberFormatException, IOException{
		BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
		String[] st=br.readLine().split(" ");
		int a=Integer.parseInt(st[0]);
		int b=Integer.parseInt(st[1]);
		int c=Integer.parseInt(st[2]);
		int count=0;
		for(int i=a;i<=b;i++){
			if(c%i==0)count++;
		}System.out.println(count);
		}} Main public static void main(String [] args) throws NumberFormatException, IOException{
		BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
		String[] st=br.readLine().split(" ");
		int a=Integer.parseInt(st[0]);
		int b=Integer.parseInt(st[1]);
		int c=Integer.parseInt(st[2]);
		int count=0;
		for(int i=a;i<=b;i++){
			if(c%i==0)count++;
		}System.out.println(count);
		} main {
		BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
		String[] st=br.readLine().split(" ");
		int a=Integer.parseInt(st[0]);
		int b=Integer.parseInt(st[1]);
		int c=Integer.parseInt(st[2]);
		int count=0;
		for(int i=a;i<=b;i++){
			if(c%i==0)count++;
		}System.out.println(count);
		} BufferedReader br=new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) String[] st=br.readLine().split(" "); st br.readLine().split(" ") br.readLine().split br.readLine() br.readLine br " " int a=Integer.parseInt(st[0]); a Integer.parseInt(st[0]) Integer.parseInt Integer st[0] st 0 int b=Integer.parseInt(st[1]); b Integer.parseInt(st[1]) Integer.parseInt Integer st[1] st 1 int c=Integer.parseInt(st[2]); c Integer.parseInt(st[2]) Integer.parseInt Integer st[2] st 2 int count=0; count 0 for(int i=a;i<=b;i++){
			if(c%i==0)count++;
		} int i=a; int i=a; i a i<=b i b i++ i++ i {
			if(c%i==0)count++;
		} {
			if(c%i==0)count++;
		} if(c%i==0)count++; c%i==0 c%i c i 0 count++ count System.out.println(count) System.out.println System.out System System.out count String [] args args public class Main{
	public static void main(String [] args) throws NumberFormatException, IOException{
		BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
		String[] st=br.readLine().split(" ");
		int a=Integer.parseInt(st[0]);
		int b=Integer.parseInt(st[1]);
		int c=Integer.parseInt(st[2]);
		int count=0;
		for(int i=a;i<=b;i++){
			if(c%i==0)count++;
		}System.out.println(count);
		}} public class Main{
	public static void main(String [] args) throws NumberFormatException, IOException{
		BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
		String[] st=br.readLine().split(" ");
		int a=Integer.parseInt(st[0]);
		int b=Integer.parseInt(st[1]);
		int c=Integer.parseInt(st[2]);
		int count=0;
		for(int i=a;i<=b;i++){
			if(c%i==0)count++;
		}System.out.println(count);
		}} Main
import java.io.*;
public class Main{
	public static void main(String [] args) throws NumberFormatException, IOException{
		BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
		String[] st=br.readLine().split(" ");
		int a=Integer.parseInt(st[0]);
		int b=Integer.parseInt(st[1]);
		int c=Integer.parseInt(st[2]);
		int count=0;
		for(int i=a;i<=b;i++){
			if(c%i==0)count++;
		}System.out.println(count);
		}}