100804

Appears in sequences

• Numbers k such that k-3, k-5, k-17, k-257, and k-65537 are all primes.at n=18A063825
• Numbers k with abundance radius of 8, i.e., abs(sigma(k)-2*k) = 8.at n=17A088820
• Near-multiperfects with primes and powers of 2 excluded, abs(sigma(m) mod m) <= log(m).at n=41A117348
• Near-multiperfects with primes, powers of 2 and 6 * prime excluded, abs(sigma(n) mod n) <= log(n).at n=41A117349
• Near-multiperfects with primes, powers of 2, 6 * prime and 2^n * prime excluded, abs(sigma(n) mod n) <= log(n).at n=22A117350
• Numbers k whose abundance sigma(k) - 2*k = -8. Numbers k whose deficiency is 8.at n=9A125247
• Ceiling(n/2)-perfect numbers.at n=23A177050
• Numbers k such that both the sum of the semiprime divisors of k and the sum of the prime divisors of k are squares.at n=11A227478
• Numbers k such that sigma(k) == 0 (mod k-4).at n=15A274554
• Numbers n for which A294898(n) is not zero and A294898(n) divides A000120(n); numbers for which A326130(n) = abs(A294898(n)).at n=27A326132
• Deficient numbers k > 1 such that k*p is abundant for all primes p dividing k.at n=12A341358