391612

Appears in sequences

• Numbers k with abundance radius of 8, i.e., abs(sigma(k)-2*k) = 8.at n=21A088820
• Near-multiperfects with primes, powers of 2, 6 * prime and 2^n * prime excluded, abs(sigma(n) mod n) <= log(n).at n=27A117350
• 2n^4+6n^2+4 = 2(n^2+1)(n^2+2).at n=20A120571
• Numbers k whose abundance sigma(k) - 2*k = -8. Numbers k whose deficiency is 8.at n=10A125247
• Ceiling(n/2)-perfect numbers.at n=27A177050
• Deficient numbers with increasing abundancy without being powers of 2.at n=13A228450
• Numbers k such that sigma(k) == 0 (mod k-4).at n=16A274554
• Numbers k such that A005187(k) < sigma(k) <= 2k, where A005187(k) = 2k - {binary weight of k}.at n=9A326138
• Fixed points of A368207.at n=17A368341