14084763domain: NAppears in sequencesHarshad (or Niven) amicable pairs: numbers which belong to an amicable pair in which both terms are Harshad (or Niven) numbers.at n=3A066871Larger of amicable pair (a, b) such that the sum of their number of divisors d(a) + d(b) sets a new record.at n=13A339679