203432

Appears in sequences

• Larger of amicable pair.at n=20A002046
• Larger member of an infinitary amicable pair.at n=27A126170
• Largest members of k-sociable cycles of order r.at n=30A183013
• 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=32A254879
• Amicable pairs.at n=41A259180
• Amicable pairs (x < y) ordered by nondecreasing sum (x + y) and then by increasing x.at n=41A259933
• Larger of amicable pair (x, y) as they are listed in A259933.at n=20A260087
• Amicable pairs of even numbers.at n=31A262622
• Even amicable numbers.at n=33A262624
• Noncube integers n such that n^2 + 1 is the sum of 2 positive cubes.at n=37A267119
• List of pairs of amicable numbers (m,n) where the sum of the pair is divisible by 10.at n=25A291422
• Larger of bi-unitary amicable pair.at n=27A292981
• 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=20A324709
• 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=23A328063
• 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=19A328065
• Length of the n-th Golomb ruler constructed by the Paul Erdős and Pál Turán formula.at n=15A380790
• 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=24A383714
• 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=20A385186