410810399

Properties

Appears in sequences

• Primes which produce records in A157188, at index i=pi(a(n)) (pi=A000720).at n=28A157190
• Primes p for which sigma(p+1)/sigma(p) reaches a record value, where sigma(k) is the divisor sum function (A000203).at n=34A326393
• Numbers k where records occur for sigma(k+1)/sigma(k), where sigma(k) is the sum of divisors of k (A000203).at n=32A335067
• Numbers k achieving record deficiency via a residue-based measure, M(k) = (k+1)*(1 - zeta(2)/2) - 1 - ( Sum_{j=1..k} k mod j )/k.at n=35A362082
• Prime numbersat n=21881639