#include<iostream>

 #include<cstdio>

 #include<algorithm>

 #include<cstring>

 #define MOD 998244353

 using namespace std;

 typedef long long ll;

 ll phi(ll x)

 {

     ll ret=x;

     for (ll i=;i*i<=x;i++)

     {

         if (x%i==)

         {

             ret-=ret/i;

             while (x%i==) x/=i;

         }

     }

     if (x>) ret-=ret/x;

     return ret%MOD;

 }

 void solve()

 {

     ll n,m;

     scanf("%lld%lld",&n,&m);

     printf("%lld",(phi(n)%MOD)*(phi(m)%MOD)%MOD*(n%MOD)%MOD*(m%MOD)%MOD);

 }

 int main()

 {

     solve();

     return ;

 }