#include <bits/stdc++.h>
using namespace std;

int main()
{

    int N, M;
    cin >> N >> M;

    long long Max = 0;
    long long now = 0;
    for (long long i = 1; i <= N; i++)
    {
        long long tmp = now + M;
        for (long long j = 1; j * j <= i; j++)
        {
            if (i % j != 0)
                continue;
            // if (j != 1)
            tmp -= j;
            if (i / j != j)
            {
                tmp -= i / j;
            }
        }
        now = tmp;
        Max = max(Max, tmp);
    }
    cout << Max;
}