430272

Appears in sequences

• Near-multiperfects with primes, powers of 2, 6 * prime and 2^n * prime excluded, abs(sigma(n) mod n) <= log(n).at n=28A117350
• Numbers n such that sigma(n) mod n = 12, n is divisible by 6, but n/6 is not prime.at n=4A216697
• Sporadic solutions m to the congruence sigma(m) == 12 (mod m).at n=7A234238
• n such that 3 < sigma(n)/n < sigma(m)/m for all abundant numbers m<n such that 3 < sigma(m)/m.at n=10A259312
• Numbers k such that sigma(k) == 0 (mod k+4).at n=14A274553
• a(n) = Sum_{-n<i<n, -n<j<n, gcd{i,j}=1} (n-|i|)*(n-|j|).at n=28A331771