4199030

Appears in sequences

• Weird numbers m such that the sum of their divisors below A033880(m) is greater than A033880(m) = abundance of m.at n=15A100696
• Numbers k whose abundance is 20: sigma(k) - 2*k = 20.at n=11A223611
• Least primitive weird number with n prime divisors, not counting multiplicity.at n=2A258374
• Primitive weird numbers (A002975) of the form 2^k*p*q*x with k >= 0 and odd p, q, x >= 3.at n=10A258401
• Primitive weird numbers, pwn, of the form 2^k*p*q*r*s with k > 0 and where p < q < r < s are odd primes.at n=0A258884
• Least primitive weird number, pwn, (A002975) which is divisible by the n-th prime (A000040).at n=14A265727
• Numbers k such that sigma(k) == 0 (mod k+10).at n=12A274565
• Primitive weird numbers (pwn; A002975) congruent to 2 mod 4.at n=3A319735
• Weird admirable numbers: numbers that are both weird (A006037) and admirable (A111592).at n=18A329190
• Unitary Zumkeller numbers (A290466) whose set of unitary divisors can be partitioned into two disjoint sets of equal sum in a single way.at n=21A335202
• Weird numbers k such that k-1 is the sum of a subset of the aliquot divisors of k.at n=10A354281
• Weird numbers k such that k+1 is the sum of a subset of the aliquot divisors of k.at n=20A354282
• Weird numbers k such that k-1 and k+1 are both sums of subsets of the aliquot divisors of k.at n=5A354283
• Primitive unitary abundant numbers k (A302573) whose unitary abundancy index usigma(k)/k has a record low value.at n=12A362054
• Unitary weird numbers (A064114) with more unitary divisors than any smaller weird number.at n=2A363297