#include <bits/stdc++.h>
using namespace std;
void shuru_krte_hai_bina_kisi_bakchodi_ke() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
}
const long long mod = 998244353;
long long power(long long x, long long y) {
  long long res = 1;
  x = x % mod;
  if (x == 0) return 0;
  while (y > 0) {
    if (y & 1) res = (res * x) % mod;
    y = y >> 1;
    x = (x * x) % mod;
  }
  return res;
}
int main() {
  shuru_krte_hai_bina_kisi_bakchodi_ke();
  long long n, k;
  cin >> n >> k;
  long long fact[n + 1];
  fact[1] = 1;
  fact[0] = 1;
  for (int i = 2; i <= n; i++) {
    fact[i] = fact[i - 1] * i;
    fact[i] %= mod;
  }
  if (n < k) {
    cout << 0 << "\n";
  } else if (k == 1) {
    cout << n << "\n";
  } else {
    long long ans = 0;
    long long i = 1;
    while (1) {
      long long nos = n / i - 1;
      if (nos < k - 1) {
        break;
      }
      long long val = (fact[k - 1] * fact[nos - k + 1]) % mod;
      ans =
          (ans + ((fact[nos] % mod) * (power(val, mod - 2) % mod)) % mod) % mod;
      i++;
    }
    cout << ans << "\n";
  }
  return 0;
}
