285541

Appears in sequences

• Least number having n divisors such that every sum of two or more divisors is composite.at n=7A160763
• Smallest product of three distinct primes of the form n*k+1.at n=14A193873
• Smallest product of three distinct primes of the form n*k+1.at n=29A193873
• Numbers that occur more than once in A193873, in order of appearance.at n=6A194263
• Pseudoprimes divisible by a smaller pseudoprime.at n=21A215150
• Fermat pseudoprimes to base 2 with three prime factors divisible by a smaller Fermat pseudoprime to base 2.at n=5A215944
• Composite integers k such that 2^k == 2 (mod k*(k+1)).at n=34A217465
• Composite integers k satisfying 2^d == 2^(k/d) (mod k) for all d|k and that are not Super-Poulet (A050217).at n=7A291602