80535

Appears in sequences

• Odd numbers k such that abs(sigma(k)-2k) <= sqrt(k). Abundance-radius = abs(sigma(k)-2k) does not exceed square root of k and k is odd.at n=29A087415
• Odd admirable numbers: such that sigma(n) = 2n + 2d for some d | n.at n=15A109729
• Odd squarefree abundant numbers.at n=28A112643
• Odd unitary abundant numbers.at n=28A129485
• Least k with precisely n partitions k = x + y satisfying x > 0 and k' = x' + y', where k', x', y' are the arithmetic derivatives of k, x, y.at n=12A212664
• Numbers n such that n^1+n+1, n^2+n+1, n^3+n+1 and n^4+n+1 are all prime.at n=32A219117
• Abundant numbers whose aliquot sequence is abundant, deficient, abundant, ..., etc.at n=15A234969
• Primitive, odd, squarefree abundant numbers.at n=28A249263
• Odd unitary admirable numbers: the odd terms of A328328.at n=0A329188
• Odd bi-unitary admirable numbers: the odd terms of A334972.at n=4A334973
• Odd infinitary admirable numbers: the odd terms of A334974.at n=3A334975
• Odd unitary abundant numbers whose unitary abundancy is closer to 2 than that of any smaller odd unitary abundant number.at n=11A335052
• Odd non-coreful abundant numbers: the odd terms of A308127.at n=29A339938
• Odd numbers k such that A360522(k) > 2*k.at n=28A360526
• Odd modified exponential abundant numbers: odd numbers k such that A241405(k) > 2*k.at n=28A379031
• Odd numbers k such that gcd(A276086(sigma(k)-k), A276086(k)) is equal to A276086(k), where A276086 is the primorial base exp-function, and sigma is the sum of divisors function.at n=39A388267