652664

Appears in sequences

• Untouchable amicable numbers: amicable pairs which cannot be reached by any aliquot sequence starting from a number that does not belong to this pair.at n=3A238382
• Larger of amicable pair (x, y) as they are listed in A259933.at n=32A260087
• Twin amicable numbers (m,n) where there is not any part of another amicable pair between m and n.at n=31A273259
• Amicable pairs where only deficient aliquot parts are considered.at n=11A280516
• Larger 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=32A324709
• 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=33A328065
• Greater 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=7A364860
• Integers k such that there exists an integer 0<m<k such that m*sigma(m)^2 + k*sigma(k)^2 = (m+k)^3.at n=34A383714