import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String[] str = sc.nextLine().split(" ");
        int start = Integer.parseInt(str[0]);
        int end = Integer.parseInt(str[1]);
        int num = Integer.parseInt(str[2]);

        System.out.println(Function(start,end,num));
        sc.close();
    }

    public static int Function(int start, int end, int num){
        int ans = 0;
        for(;start <= end; ){
            if( num%start == 0 ) ans++;
            start++;
        }
        return ans;
    }

}
/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