OFFSET
1,2
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..10000
FORMULA
Multiplicative with a(p^e) = (5p)^e.
If n = Product p(k)^e(k) then a(n) = Product (5*p(k))^e(k).
Dirichlet g.f.: Product_{p prime} 1 / (1 - 5 * p^(1 - s)). - Ilya Gutkovskiy, Oct 30 2019
MATHEMATICA
Table[n*5^PrimeOmega[n], {n, 1, 100}] (* G. C. Greubel, May 19 2016 *)
PROG
(PARI) a(n) = n*5^bigomega(n); \\ Michel Marcus, May 19 2016
CROSSREFS
KEYWORD
nonn,mult
AUTHOR
Jaroslav Krizek, Oct 18 2009
STATUS
approved