92781

Appears in sequences

• Numbers k such that (1/k) * Sum_{d|k} d*sigma(d) is an integer.at n=21A069520
• a(n+2) = a(n+1) + a(n) - (2*n + 1) where a(0)=7, a(1)=11.at n=21A088981
• The Wiener index of the graph obtained by applying Mycielski's construction to a benzenoid consisting of a linear chain of n hexagons.at n=30A228597
• Odd integers k such that sigma(k)^2 is divisible by k.at n=3A263983
• Odd numbers k such that rad(k) divides sigma(k).at n=12A336554
• Numbers k for which A053585(sigma(k)) is equal to A053585(k) and that satisfy also Euler's condition for odd perfect numbers (A228058).at n=2A388276
• Odd numbers k for which A000005(2*k) >= A017665(2*k), where A000005 is the number of divisors function, and A017665 is the numerator of the abundancy ratio, sigma(k)/k.at n=11A388277
• Odd spoof k-perfect numbers of order <= 10.at n=7A389834