OFFSET
1,2
COMMENTS
a(n) = the smallest number m such that A306682(m) = n.
EXAMPLE
For n=2; a(2) = 10 because gcd(sigma(10), pod(10)) = gcd (18, 100) = 2 and 10 is the smallest.
PROG
(Magma) [Min([n: n in[1..10^5] | GCD(SumOfDivisors(n), &*[d: d in Divisors(n)]) eq k]): k in [1..45]]
(PARI) f(n) = my(d=divisors(n)); gcd(vecsum(d), vecprod(d)); \\ A306682
a(n) = {my(k=1); while (f(k) != n, k++); k; } \\ Michel Marcus, Mar 05 2019
CROSSREFS
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Mar 05 2019
STATUS
approved