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 A072500 Product of divisors of n which are >= n^(1/2). 16
 1, 2, 3, 8, 5, 18, 7, 32, 27, 50, 11, 288, 13, 98, 75, 512, 17, 972, 19, 1000, 147, 242, 23, 13824, 125, 338, 243, 2744, 29, 27000, 31, 4096, 363, 578, 245, 419904, 37, 722, 507, 64000, 41, 86436, 43, 10648, 6075, 1058, 47, 1769472, 343, 12500, 867, 17576, 53 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS a(n) = n iff n is not a composite number. LINKS Harvey P. Dale, Table of n, a(n) for n = 1..1000 EXAMPLE The divisors of 20 are 1, 2, 4, 5, 10 and 20. a(20) = 5*10*20= 1000. MATHEMATICA Table[Times @@ Select[Divisors[n], # >= Sqrt[n] &], {n, 1, 55}] CROSSREFS Cf. A072499, A072501 & A070038. Sequence in context: A070935 A095164 A075384 * A208449 A346957 A062956 Adjacent sequences: A072497 A072498 A072499 * A072501 A072502 A072503 KEYWORD nonn AUTHOR Amarnath Murthy, Jul 20 2002 EXTENSIONS Edited by Robert G. Wilson v, Jul 22 2002 Corrected a(16) by Harvey P. Dale, Oct 06 2011 STATUS approved

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Last modified February 21 03:13 EST 2024. Contains 370219 sequences. (Running on oeis4.)