263055
domain: N
Appears in sequences
- Numbers k such that sigma(k) = 4*phi(k).at n=28A068390
- Numbers k such that k, 2*k and 4*k are balanced numbers (A020492).at n=33A076376
- Numbers k such that k, 2*k, 4*k and 8*k are balanced numbers (A020492).at n=12A076377
- Numbers k such that gcd(sigma(k), phi(k)) (A009223) attains record values.at n=37A222711