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 A324645 a(n) = gcd(d(n), A276086(n)), where d(n) gives the number of divisors (A000005). 2
 1, 1, 2, 3, 2, 1, 2, 1, 3, 1, 2, 1, 2, 1, 2, 5, 2, 1, 2, 3, 2, 1, 2, 1, 1, 1, 2, 3, 2, 1, 2, 3, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 3, 6, 1, 2, 5, 1, 3, 2, 3, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 6, 7, 2, 1, 2, 3, 2, 1, 2, 1, 2, 1, 6, 3, 2, 1, 2, 5, 5, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 3, 2, 1, 2, 1, 2, 3, 6, 9, 2, 1, 2, 1, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS Antti Karttunen, Table of n, a(n) for n = 1..30030 FORMULA a(n) = gcd(A000005(n), A276086(n)). PROG (PARI) A276086(n) = { my(i=0, m=1, pr=1, nextpr); while((n>0), i=i+1; nextpr = prime(i)*pr; if((n%nextpr), m*=(prime(i)^((n%nextpr)/pr)); n-=(n%nextpr)); pr=nextpr); m; }; A324645(n) = gcd(numdiv(n), A276086(n)); CROSSREFS Cf. A000005, A009191, A276086, A324644. Sequence in context: A084311 A026490 A053555 * A124160 A265847 A260342 Adjacent sequences:  A324642 A324643 A324644 * A324646 A324647 A324648 KEYWORD nonn AUTHOR Antti Karttunen, Mar 11 2019 STATUS approved

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Last modified January 21 13:54 EST 2020. Contains 331113 sequences. (Running on oeis4.)