91963648

Appears in sequences

• Numbers m such that the sum of the first k divisors of m is equal to m for some k.at n=15A064510
• Admirable numbers that set a new record for largest subtracted divisor.at n=13A109745
• Numbers k such that sigma(k)/k = 5/2.at n=1A141643
• Numbers m with half-integral abundancy index, sigma(m)/m = k+1/2 with integer k.at n=8A159907
• Erdős-Nicolas numbers.at n=9A194472
• Numbers n such that gcd(sigma(n), n) > gcd(sigma(m), m) for all m < n.at n=26A216793
• Numbers k such that k divides sigma(3*k).at n=32A227303
• Numbers n such that antisigma(n) mod n = 0, where antisigma(n) = A024816(n) = sum of numbers less than n which do not divide n.at n=9A242484
• Numbers k that divide 2*sigma(k).at n=22A246454
• Numbers k such that the continued fraction of the abundancy index of k contains a single distinct element.at n=36A349686
• Numbers whose numerator and denominator of their abundancy index are both Fibonacci numbers.at n=33A349687
• Admirable numbers with more divisors than any smaller admirable number.at n=14A364726