170561

Appears in sequences

• Numbers k such that A065608(k) = A065608(k+2).at n=28A065064
• Numbers k such that k and k+2 have the same number (A000005) and sum of divisors (A000203).at n=24A229254
• Numbers k such that s(k) = s(k+2), where s(k) is the sum of odd divisors of k (A000593).at n=25A387920