27914146

Appears in sequences

• Numbers that are equal to the sum of their anti-divisors.at n=14A073930
• Harmonic anti-divisor numbers.at n=22A192272
• 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=20A214842
• 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=31A229861
• 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=41A229862
• Numbers x such that the sum of remainders of x mod k, where k runs through the anti-divisors of x, divides x.at n=20A255733