389924

Appears in sequences

• Larger of amicable pair.at n=23A002046
• Numbers k such that sigma(k) + phi(k) is a repdigit.at n=20A116019
• Largest members of k-sociable cycles of order r.at n=32A183013
• Let us denote 's' the sum of the deficient numbers in the aliquot parts of x. Sequence lists numbers x such that sigma(s)-s is equal to x.at n=34A254879
• Amicable pairs (x < y) ordered by nondecreasing sum (x + y) and then by increasing x.at n=47A259933
• Larger of amicable pair (x, y) as they are listed in A259933.at n=23A260087
• Amicable pairs of even numbers.at n=37A262622
• Even amicable numbers.at n=39A262624
• Amicable pairs with the property that the number of divisors of the smaller member is greater than the number of divisors of the larger member.at n=27A328063
• 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=21A328065
• Larger 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=23A333930
• 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=27A383714
• Numbers y such that there exists an integer 0 < x < y such that sigma(x)^x * sigma(y)^y = (x+y)^(x+y).at n=23A385186