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

public class DWITE2
{
  public static void main(String[] args)throws Exception 
  {
    BufferedReader filein;
    int n=0, count=0, n1=1, n2=1;
    filein = new BufferedReader (new FileReader("DATA2.txt"));
    PrintWriter pw = new PrintWriter(new FileWriter ( "OUT2.txt" ));
    int inputData[] = new int[5];
    
    for (int i=0;i<5;i++)
    {
      String inputLine = filein.readLine();
      inputData[i] = Integer.parseInt (inputLine);
      n=inputData[i];
      for (int j=1;j<=inputData[i];j++)
        for (int k=j;k<=inputData[i];k++)
      {
        if (k*j<=inputData[i])
          count++;
      }
      pw.println(count);
      count=0;
      n1=1;
      n2=1;
    }
    pw.flush();
    pw.close();
  }
}