84026

Appears in sequences

• Numbers that are equal to the sum of their anti-divisors.at n=10A073930
• Harmonic anti-divisor numbers.at n=15A192272
• Anti-multiply-perfect numbers. Numbers n for which sigma*(n)/n is an integer, where sigma*(n) is the sum of the anti-divisors of n.at n=15A214842
• Let sigma*_m (n) be result of applying sum of anti-divisors m times to n; call n (m,k)-anti-perfect if sigma*_m (n) = k*n; sequence gives the (2,k)-anti-perfect numbers.at n=28A229860
• Let sigma*_m (n) be result of applying sum of anti-divisors m times to n; call n (m,k)-anti-perfect if sigma*_m (n) = k*n; sequence gives the (3,k)-anti-perfect numbers.at n=20A229861
• Let sigma*_m (n) be result of applying sum of anti-divisors m times to n; call n (m,k)-anti-perfect if sigma*_m (n) = k*n; sequence gives the (4,k)-anti-perfect numbers.at n=28A229862
• Number of set partitions of [n] such that the maximal absolute difference between consecutive elements within a block equals eight.at n=2A294057
• The seventh term of the greedy B_n set of natural numbers.at n=12A369819