635624

Appears in sequences

• Smaller members of regular amicable pairs.at n=24A215491
• Smaller of amicable pair (x, y) as they are listed in A259933.at n=34A260086
• a(n) = 2*a(n-1) - a(n-3) for n >= 3, where a(0) = 2, a(1) = 4, a(2) = 6, a(3) = 8.at n=27A288603
• 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=31A324708
• Amicable pairs with the property that the number of divisors of the smaller member is twice the number of divisors of the larger member.at n=30A328065