33044291280
domain: N
Appears in sequences
- Smallest x such that sigma(x) = n*phi(x), or -1 if no such x exists.at n=30A055234
- Least balanced numbers (A020492): m such that the quotient sigma(m)/phi(m) equals the n-th prime.at n=10A063513
- a(n) = Min{x : sigma(x) = n*phi(x), x is not a prime}, the least nonprime solutions to sigma(x) = n*phi(x); special balanced numbers.at n=30A088830
- a(n) = C(n+5,5)*C(n+10,5).at n=24A104679
- Balanced numbers (A020492) k with a record value of sigma(k)/phi(k).at n=17A335287