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A053815 Floor(n / (sum of proper divisors of n)). 1
2, 3, 1, 5, 1, 7, 1, 2, 1, 11, 0, 13, 1, 1, 1, 17, 0, 19, 0, 1, 1, 23, 0, 4, 1, 2, 1, 29, 0, 31, 1, 2, 1, 2, 0, 37, 1, 2, 0, 41, 0, 43, 1, 1, 1, 47, 0, 6, 1, 2, 1, 53, 0, 3, 0, 2, 1, 59, 0, 61, 1, 1, 1, 3, 0, 67, 1, 2, 0, 71, 0, 73, 1, 1, 1, 4, 0, 79, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Charles R Greathouse IV, Table of n, a(n) for n = 2..10000

MATHEMATICA

Table[Floor[n/(DivisorSigma[1, n]-n)], {n, 2, 80}] (* Harvey P. Dale, Nov 16 2017 *)

PROG

(PARI) a(n)=n\(sigma(n)-n) \\ Charles R Greathouse IV, Mar 11 2014

CROSSREFS

Cf. A001065.

Sequence in context: A089026 A080305 A220137 * A194446 A251758 A250480

Adjacent sequences:  A053812 A053813 A053814 * A053816 A053817 A053818

KEYWORD

nonn

AUTHOR

Henry Bottomley, Mar 28 2000

STATUS

approved

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Last modified November 14 01:24 EST 2019. Contains 329108 sequences. (Running on oeis4.)