40117714

Appears in sequences

• Happy amicable pairs: numbers which belong to an amicable pair in which both terms are happy numbers.at n=5A066870
• Larger member of a nonexponential amicable pair: numbers (k, m) such that nesigma(k) = m and nesigma(m) = k, where nesigma(k) is the sum of the nonexponential divisors of k (A160135).at n=27A348603