740870

Appears in sequences

• Admirable Harshad numbers such that the subtracted divisor is also a Harshad number.at n=30A109396
• Numbers k whose abundance is 20: sigma(k) - 2*k = 20.at n=9A223611
• Numbers k such that sigma(k) == 0 (mod k+10).at n=10A274565
• 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=17A335202
• Unitary pseudoperfect numbers k such that no subset of the nontrivial unitary divisors {d|k : 1 < d < k, gcd(d, k/d) = 1} adds up to k.at n=10A342399