OFFSET
1,2
COMMENTS
Not multiplicative.
LINKS
PROG
(PARI) A355928(n) = core(sigma(n));
(Python)
from sympy.ntheory.factor_ import core, divisor_sigma
def A355928(n): return core(divisor_sigma(n)) # Chai Wah Wu, Jul 28 2022
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jul 24 2022
STATUS
approved