static void Main()
{
var ss = new StreamScanner(new StreamReader(Console.OpenStandardInput()));
var sw = new StreamWriter(Console.OpenStandardOutput())
{
AutoFlush = false
};
new Program().Solve(ss, sw);
sw.Flush();
}
void Solve(StreamScanner ss, StreamWriter sw)
{
//---------------------------------
var N = ss.Next(Long);
var K = ss.Next(Long);
if (K == 0)
{
sw.WriteLine(N * N);
return;
}
var ans = 0L;
for (var i = 0; i < N; i++)
{
ans += Math.Max(0, N / (i + 1) * (i - K + 1));
ans += Math.Max(0, N % (i + 1) - K + 1);
}
sw.WriteLine(ans);
//---------------------------------
}
