2498227

Appears in sequences

• Numbers k such that sigma(sigma(k)) = 2*phi(k).at n=9A135241
• The smallest number such that n or more numbers k exist such that a(n) - k = sopfr(a(n)) + sopfr(k), where sopfr(m) is the sum of the primes dividing m, with repetition.at n=25A369351
• The smallest number such that n or more numbers k exist such that a(n) - k = sopfr(a(n)) + sopfr(k), where sopfr(m) is the sum of the primes dividing m, with repetition.at n=26A369351
• The smallest number such that n or more numbers k exist such that a(n) - k = sopfr(a(n)) + sopfr(k), where sopfr(m) is the sum of the primes dividing m, with repetition.at n=27A369351
• The smallest number such that exactly n numbers k exist such that a(n) - k = sopfr(a(n)) + sopfr(k), where sopfr(m) is the sum of the primes dividing m, with repetition.at n=27A370091