static int largestGCDSubsequence ( int arr [ ] , int n ) {
  int ans = 0 ;
  for ( int i = 0 ;
  i < n ;
  ++ i ) {
    int element = arr [ i ] ;
    while ( element > 1 ) {
      int div = prime [ element ] ;
      ++ countdiv [ div ] ;
      ans = Math . max ( ans , countdiv [ div ] ) ;
      while ( element % div == 0 ) element /= div ;
    }
  }
  return ans ;
}

static int largestGCDSubsequence ( int arr [ ] , int n ) { int ans = 0 ; for ( int i = 0 ; i < n ; ++ i ) { int element = arr [ i ] ; while ( element > 1 ) { int div = prime [ element ] ; ++ countdiv [ div ] ; ans = Math . max ( ans , countdiv [ div ] ) ; while ( element % div == 0 ) element /= div ; } } return ans ; }
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