program main
  implicit none
  integer*8::A,B,AA,BB,CC,AB
  read *,A,B
  AB = gcd(A,B)
  A  = A/AB
  B  = B/AB
  print '(i0)',gcd(A+B,A*B*AB)*AB

contains
  recursive function gcd(a,b) result(c)
    integer*8::a,b,c
    if(b.eq.0) then
       c = a
    else
       c = gcd(b,MOD(a,b))
    end if
  end function gcd
end program main