/* -*- coding: utf-8 -*-
 *
 * 3689.cc:  No.3689 LCM Sum (Easy Version) - yukicoder
 */

#include<cstdio>
#include<algorithm>
#include<numeric>

using namespace std;

/* constant */

const int MOD = 998244353;

/* typedef */

/* global variables */

/* subroutines */

/* main */

int main() {
  int a, b;
  scanf("%d%d", &a, &b);

  int sum = 0;
  for (int i = 1; i <= a; i++)
    for (int j = 1; j <= b; j++)
      sum = (sum + lcm(i, j)) % MOD;

  printf("%d\n", sum);
  
  return 0;
}