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A325339
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Number of divisors of n^3 that are <= n.
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1
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1, 2, 2, 3, 2, 5, 2, 4, 3, 6, 2, 8, 2, 6, 5, 5, 2, 9, 2, 8, 5, 6, 2, 11, 3, 6, 4, 8, 2, 17, 2, 6, 6, 6, 5, 14, 2, 6, 6, 11, 2, 17, 2, 9, 8, 6, 2, 15, 3, 10, 6, 9, 2, 13, 5, 11, 6, 6, 2, 26, 2, 6, 8, 7, 5, 18, 2, 10, 6, 17, 2, 18, 2, 6, 9, 10, 5, 19, 2, 14, 5
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OFFSET
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1,2
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LINKS
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EXAMPLE
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a(10) counts these 6 divisors: 1,2,4,5,8,10.
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MATHEMATICA
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Table[Length[Select[Divisors[n^3], # <= n &]], {n, 1, 120}]
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PROG
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(PARI) a(n) = sumdiv(n^3, d, d <= n); \\ Michel Marcus, Apr 22 2019
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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