624032630

Appears in sequences

• Numbers k whose abundance is 20: sigma(k) - 2*k = 20.at n=17A223611
• Numbers k such that sigma(k) == 0 (mod k+10).at n=18A274565
• Unitary Zumkeller numbers (A290466) whose set of unitary divisors can be partitioned into two disjoint sets of equal sum in a single way.at n=26A335202
• Primitive unitary abundant numbers k (A302573) whose unitary abundancy index usigma(k)/k has a record low value.at n=18A362054