login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A088843 Number of divisors of multiply-perfect numbers. 6

%I #11 Jul 20 2019 11:11:29

%S 1,4,6,16,10,24,14,96,96,80,216,320,26,384,480,288,576,224,34,1920,

%T 2304,1056,480,896,38,960,1344,3456,1620,5280,6336,3888,10368,9216,

%U 2816,3584,6480,16384,5400,9600,62,25344,12960,41472,110592,32256,62208,51840,48384

%N Number of divisors of multiply-perfect numbers.

%H Amiram Eldar, <a href="/A088843/b088843.txt">Table of n, a(n) for n = 1..1600</a> (calculated from the b-file at A007691)

%F a(n) = A000005(A007691(n)).

%t s = {}; Do[If[Divisible[DivisorSigma[1, n], n], AppendTo[s, DivisorSigma[0, n]]], {n, 1, 10^6}]; s (* _Amiram Eldar_, Jul 20 2019 *)

%Y Cf. A000005, A007691.

%K nonn

%O 1,2

%A _Labos Elemer_, Nov 05 2003

%E More terms from _Michel Marcus_, Sep 19 2013

%E Data corrected by _Amiram Eldar_, Jul 20 2019

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 18 23:40 EDT 2024. Contains 376002 sequences. (Running on oeis4.)