OFFSET
1,2
COMMENTS
Sequence of the smallest numbers k such that a(k) = n: 1, 2, 9, 6, 400, 12, 3136, 24, 36, 80, 123904, 60, 692224, 448, 2025, 120, ...
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..16384
Antti Karttunen, Data supplement: n, a(n) computed for n = 1..65537
EXAMPLE
For n=6: a(6) = gcd(tau(6), pod(6)) = gcd(4, 36) = 4.
PROG
(Magma) [GCD(NumberOfDivisors(n), &*[d: d in Divisors(n)]): n in [1.. 100]]
(PARI) a(n) = gcd(numdiv(n), vecprod(divisors(n))); \\ Michel Marcus, Mar 04 2019
CROSSREFS
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Mar 04 2019
STATUS
approved