116865

Appears in sequences

• Odd numbers n such that sigma(n) = sigma(2*n-1).at n=3A275370
• Numbers k whose sum of divisors equals the sum of divisors of 2*k-1.at n=17A289738
• Numbers that are divisible by the squares of two distinct primes and whose arithmetic derivative (A003415) is a squarefree number of the form 4k+2.at n=40A368697