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

public class Main{
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);
        int a,b,c,i,count;
        a = sc.nextInt();
        b = sc.nextInt();
        c = sc.nextInt();
        count=0;
        for(i=a; i<=b; i++){
            if(c % i == 0) count++;
        }
        System.out.println(count);
    }
} import java.util.Scanner; Scanner java.util import java.io.*; io.* java public class Main{
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);
        int a,b,c,i,count;
        a = sc.nextInt();
        b = sc.nextInt();
        c = sc.nextInt();
        count=0;
        for(i=a; i<=b; i++){
            if(c % i == 0) count++;
        }
        System.out.println(count);
    }
} Main public static void main(String args[]){
        Scanner sc = new Scanner(System.in);
        int a,b,c,i,count;
        a = sc.nextInt();
        b = sc.nextInt();
        c = sc.nextInt();
        count=0;
        for(i=a; i<=b; i++){
            if(c % i == 0) count++;
        }
        System.out.println(count);
    } main {
        Scanner sc = new Scanner(System.in);
        int a,b,c,i,count;
        a = sc.nextInt();
        b = sc.nextInt();
        c = sc.nextInt();
        count=0;
        for(i=a; i<=b; i++){
            if(c % i == 0) count++;
        }
        System.out.println(count);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int a a b b c c i i count; count a = sc.nextInt() a sc.nextInt() sc.nextInt sc b = sc.nextInt() b sc.nextInt() sc.nextInt sc c = sc.nextInt() c sc.nextInt() sc.nextInt sc count=0 count 0 for(i=a; i<=b; i++){
            if(c % i == 0) count++;
        } i=a; 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[]){
        Scanner sc = new Scanner(System.in);
        int a,b,c,i,count;
        a = sc.nextInt();
        b = sc.nextInt();
        c = sc.nextInt();
        count=0;
        for(i=a; i<=b; i++){
            if(c % i == 0) count++;
        }
        System.out.println(count);
    }
} public class Main{
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);
        int a,b,c,i,count;
        a = sc.nextInt();
        b = sc.nextInt();
        c = sc.nextInt();
        count=0;
        for(i=a; i<=b; i++){
            if(c % i == 0) count++;
        }
        System.out.println(count);
    }
} Main
import java.util.Scanner;
import java.io.*;

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