id:A086454 - OEIS Search Results

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Number of divisors of prime powers: tau(p^e).

+0
2

1, 2, 2, 3, 2, 2, 4, 3, 2, 2, 5, 2, 2, 2, 3, 4, 2, 2, 6, 2, 2, 2, 2, 3, 2, 2, 2, 7, 2, 2, 2, 2, 5, 2, 2, 2, 2, 2, 2, 2, 2, 3, 4, 2, 8, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 6, 2, 9, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 4, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`a(n) = A000005(A000961(n)).`
	LINKS	`Eric Weisstein's World of Mathematics, Prime Power.` `Eric Weisstein's World of Mathematics, Divisor Function`
	FORMULA	`a(p^e) = e+1: a(n)=A025474(n)+1.`
	CROSSREFS	`Cf. A086455.` `Sequence in context: A131836 A133829 A160651 this_sequence A069360 A068050 A156220` `Adjacent sequences: A086451 A086452 A086453 this_sequence A086455 A086456 A086457`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jul 20 2003`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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