#include <bits/stdc++.h>
using namespace std;
void optimise() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
}
long long int mod = 998244353;
void normalize(long long int &a) { a = (a + mod) % mod; }
long long int modmul(long long int a, long long int b) {
  a = a % mod;
  b = b % mod;
  normalize(a);
  normalize(b);
  return (a * b) % mod;
}
long long int modadd(long long int a, long long int b) {
  a = a % mod;
  b = b % mod;
  normalize(a);
  normalize(b);
  return (a + b) % mod;
}
long long int modsub(long long int a, long long int b) {
  a = a % mod;
  b = b % mod;
  normalize(a);
  normalize(b);
  return (a - b + mod) % mod;
}
long long int me(long long int x, long long int n) {
  x %= mod;
  if (n == 0) return 1;
  long long int u = me(x, n / 2) % mod;
  u = (u * u) % mod;
  if (n % 2) u = (u * x) % mod;
  return u;
}
long long int me1(long long int x, long long int n) {
  if (n == 0) return 1;
  long long int u = me1(x, n / 2);
  u = u * u;
  if (n % 2) u = u * x;
  return u;
}
inline long long int modInv(long long int a) { return me(a, mod - 2); }
inline long long int modDiv(long long int a, long long int b) {
  return modmul(a, modInv(b));
}
long long int __gcd(long long int a, long long int b) {
  if (b == 0)
    return a;
  else
    return __gcd(b, a % b);
}
void solve() {
  long long int n, k;
  cin >> n >> k;
  long long int inv[n + 11];
  long long int fact[n + 11];
  inv[0] = 1;
  fact[0] = 1;
  for (long long int i = 1; i <= n; i++) {
    fact[i] = (fact[i - 1] * i) % mod;
    fact[i] %= mod;
  }
  for (long long int i = 1; i <= n; i++) {
    inv[i] = modDiv(inv[i - 1], i);
  }
  long long int ans = 0;
  for (long long int i = 1; i <= n; i++) {
    long long int k1 = n / i;
    k1--;
    if (k1 >= k - 1) {
      long long int ans1 =
          modmul(fact[k1], modmul(inv[k1 - k + 1], inv[k - 1]));
      ans = modadd(ans, ans1);
    } else
      break;
  }
  cout << ans;
}
signed main() {
  optimise();
  long long int t;
  t = 1;
  cout << fixed << setprecision(5);
  while (t--) {
    solve();
    cout << "\n";
  }
}
