#include <bits/stdc++.h>
using namespace std;
const long long mod = 1e9 + 7, inf = 1e18, md = 998244353;
inline long long power(long long a, long long b) {
  long long ans = 1, temp = a;
  while (b != 0) {
    if (b & 1) ans = ans * temp;
    ans = ans % md;
    temp = temp * temp;
    temp = temp % md;
    b /= 2;
  }
  return ans;
}
signed main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  long long n, k;
  cin >> n >> k;
  long long fact[n + 1], inv[n + 1];
  fact[0] = 1;
  inv[0] = 1;
  for (long long i = 1; i < n + 1; i++) fact[i] = (i * fact[i - 1]) % md;
  for (long long i = 1; i < n + 1; i++) inv[i] = power(fact[i], md - 2) % md;
  if (n < k) {
    cout << "0";
    return 0;
  }
  if (k == 1) {
    cout << n;
    return 0;
  }
  long long ans = 0;
  for (long long i = 1; i < n + 1; i++) {
    long long x = n / i;
    if (x < k) break;
    ans = (ans + ((fact[x - 1] * inv[k - 1]) % md * inv[x - k]) % md) % md;
  }
  cout << ans << "\n";
}
