308220

Appears in sequences

• Smaller of unitary amicable pair.at n=12A002952
• Unitary amicable numbers.at n=23A063991
• Smaller member of an infinitary amicable pair.at n=31A126169
• Smaller of bi-unitary amicable pair.at n=32A292980
• Lesser of semi-unitary amicable numbers pair: numbers (m, n) such that susigma(m) = susigma(n) = m + n, where susigma(n) is the sum of the semi-unitary divisors of n (A322485).at n=25A322541
• Lesser of modified exponential amicable pairs.at n=20A323758
• Lesser of tri-unitary amicable numbers pair: numbers (m, n) such that tsigma(m) = tsigma(n) = m + n, where tsigma(n) is the sum of the tri-unitary divisors of n (A324706).at n=22A324708
• a(n) is the smallest member of the n-th purely periodic unitary sigma aliquot cycle listed in A336216.at n=22A336219