44461

Appears in sequences

• Number of (w,x,y,z) with all terms in {1,...,n} and w^2<x^2+y^2+z^2.at n=15A212092
• Least number k such that n divides gcd(sigma(k), phi(k)) (A009223).at n=42A222713
• Smallest i such that prime(n) divides gcd(sigma(i), phi(i)) (cf. A009223).at n=13A222714
• Numbers n for which A326073(n) is equal to abs(1+A326146(n)).at n=17A326074