66928

Appears in sequences

• Smaller of an amicable pair: (a,b) such that sigma(a) = sigma(b) = a+b, a < b.at n=9A002025
• Amicable numbers.at n=17A063990
• Integers that are Rhonda numbers to base 12.at n=32A100971
• n+p(n)+p(p(n)) is a square, where p(n) is the n-th prime.at n=18A116011
• Smallest amicable number of the form 2^n * p * q for which the larger member of the amicable pair has the same form, where p and q are distinct odd primes.at n=2A180330
• Irregular triangle in which row n consists of the smaller of pairs of amicable numbers of the form 2^n pq, with p and q odd primes.at n=3A180650
• Conjectured list of smallest terms of k-sociable cycles of order r.at n=19A183016
• Conjectured list of multisociable numbers.at n=30A183019
• Numbers k such that sigma(k) = sigma(sigma(k)-k).at n=21A206708
• Smaller members of regular amicable pairs.at n=6A215491
• Abundant numbers whose aliquot sequence is abundant, deficient, abundant, ..., etc.at n=11A234969
• 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=17A254879
• Amicable pairs.at n=18A259180
• Amicable pairs (x < y) ordered by nondecreasing sum (x + y) and then by increasing x.at n=16A259933
• Smaller of amicable pair (x, y) as they are listed in A259933.at n=8A260086
• Amicable pairs of even numbers.at n=16A262622
• Even amicable numbers.at n=15A262624
• Twin amicable numbers (m,n) where there is not any part of another amicable pair between m and n.at n=16A273259
• Numbers n whose abundance is 64: sigma(n) - 2n = 64.at n=6A275996
• Amicable pairs where only deficient aliquot parts are considered.at n=6A280516