166530

Appears in sequences

• Numbers k such that usigma(k) >= 3*k, where usigma(k) = sum of unitary divisors of k (A034448).at n=30A285615
• Numbers k satisfying gcd(k^2, sigma(k^2)) > sigma(k), where sigma is the sum-of-divisors function.at n=38A322154
• Unitary barely 3-abundant: numbers m such that 3 < usigma(m)/m < usigma(k)/k for all numbers k < m, where usigma is the sum of unitary divisors function (A034448).at n=12A336671
• Products of 6 distinct primes that are sandwiched between semiprime numbers.at n=16A378627
• Squarefree 3-abundant numbers: squarefree numbers k such that A000203(k) > 3*k.at n=30A387153