522405

Appears in sequences

• Smaller of an amicable pair: (a,b) such that sigma(a) = sigma(b) = a+b, a < b.at n=29A002025
• Smaller members of regular amicable pairs.at n=20A215491
• Smaller of amicable pair (x, y) as they are listed in A259933.at n=29A260086
• Amicable pairs of odd numbers.at n=10A262623
• Odd amicable numbers.at n=10A262625
• Twin amicable numbers (m,n) where there is not any part of another amicable pair between m and n.at n=28A273259
• Amicable pairs where only deficient aliquot parts are considered.at n=8A280516
• List of pairs of amicable numbers (m,n) where the sum of the pair is divisible by 10.at n=30A291422
• Amicable pairs with the property that both members have the same number of divisors.at n=24A328064
• Lesser of recursive amicable numbers pair: numbers m < k such that m = s(k) and k = s(m), where s(k) = A333926(k) - k is the sum of proper recursive divisors of k.at n=31A333929
• Lesser of amicable pair (a, b) such that the sum of their number of divisors d(a) + d(b) sets a new record.at n=7A339678
• a(n) = binomial(n,2)*(binomial(n-1,2) + 2).at n=38A352405
• Lesser of a pair of S-amicable numbers k < m such that s(k) = m and s(m) = k, where s(k) = A364858(k).at n=6A364859