199760

Appears in sequences

• The smaller of a betrothed pair.at n=11A003502
• Betrothed (or quasi-amicable) numbers.at n=20A005276
• a(n) = (1/n) * Sum_{d|n} phi(n/d)*2^(d+1).at n=20A161219
• Quasi-amicable pairs.at n=22A328370