51835

Appears in sequences

• Numbers k such that A065608(k) = A065608(k+2).at n=18A065064
• Numbers k such that k and k+2 have the same number (A000005) and sum of divisors (A000203).at n=15A229254
• Numbers k such that the sum of the numbers from 1 to k and that from 1 to k+1 share the same sum of divisors.at n=27A375819
• Numbers k such that s(k) = s(k+2), where s(k) is the sum of odd divisors of k (A000593).at n=14A387920