login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A332932 Sum of ceiling(sqrt(d)) where d runs through the divisors of n. 5

%I

%S 1,3,3,5,4,8,4,8,6,10,5,14,5,10,10,12,6,16,6,17,11,12,6,22,9,13,12,18,

%T 7,25,7,18,13,14,13,28,8,15,14,27,8,27,8,21,20,15,8,33,11,23,16,23,9,

%U 30,16,29,16,17,9,44,9,17,22,26,17,32,10,25,17,32,10

%N Sum of ceiling(sqrt(d)) where d runs through the divisors of n.

%p a:= n-> add(ceil(sqrt(d)), d=numtheory[divisors](n)):

%p seq(a(n), n=1..80); # _Alois P. Heinz_, Mar 02 2020

%t Table[DivisorSum[n,Ceiling[Sqrt[#]]&],{n,80}]

%o (PARI) a(n) = sumdiv(n, d, ceil(sqrt(d))); \\ _Michel Marcus_, Mar 03 2020

%Y Cf. A058268, A086671, A332931, A332933, A332934, A332935.

%K nonn

%O 1,2

%A _Harvey P. Dale_, Mar 02 2020

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 31 15:51 EDT 2021. Contains 346374 sequences. (Running on oeis4.)