import java.util.*;

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