2146926592

Appears in sequences

• Expansion of 2*x^3/((1-2*x)^2*(1-4*x)).at n=17A000431
• Numbers k such that sigma(k) = 2k + Omega(k), where Omega(n) is the number of prime divisors of n (with repetition).at n=7A063788
• Composite numbers n that divide 2 * sigma(n) - d(n) [that is, 2 * sum of divisors - number of divisors].at n=20A135470
• Numbers n whose abundance is 16.at n=19A141547
• Numbers m with divisor 16 | m and abundance sigma(m)-2*m = 16.at n=7A181599
• Numbers of the form 2^(t-1)*(2^t-17), where 2^t-17 is prime.at n=3A181706
• Numbers k such that sigma(k) == 0 (mod k+8).at n=24A274561
• Practical numbers (A005153) that are abundant and have a record low value of abundancy index.at n=27A362052
• Primitive abundant numbers k (A071395) whose abundancy index sigma(k)/k has a record low value.at n=30A362053