#!/usr/bin/env perl

use strict;
use warnings;

my ($n, $k) = split / /, <>; chomp $k;

if ($k >= 21) {
  print "0\n";
  exit;
}

my $ans = 0;
my %h;
for (my $i = 2; $i <= $n; $i++) {
  if (!exists$h{$i}) {
    for (my $j = $i; $j <= $n; $j+=$i) {
      $h{$j}++;
    }
  }
  if ($h{$i} >= $k) {
    $ans++;
  }
}

print "$ans\n";