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Search: id:A086487
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| A086487 |
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Smallest number with n prime divisors such that the sum of the prime divisors is also a divisor, or 0 if no such number exists. |
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+0
5
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| 2, 0, 30, 1122, 2730, 72930, 870870, 9699690, 340510170, 9592993410, 265257422430, 8624101075590, 304250263527210, 14299762385778870, 1164365758518632670, 43657174563782890110, 1987938667108592728530
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OFFSET
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1,1
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COMMENT
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First member of A086486 with n distinct prime factors. A001221(a(n)) = n; A008472(a(n)) divides a(n). - David Wasserman (wasserma(AT)spawar.navy.mil), Mar 09 2005
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EXAMPLE
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a(3) = 30. The prime divisors of 30 are 2,3 and 5 and 2+3+5 = 10, divides 30.
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CROSSREFS
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Cf. A086486, A086488.
Cf. A001221, A008472, A104465, A104466.
Sequence in context: A007218 A092177 A104466 this_sequence A071147 A156481 A156452
Adjacent sequences: A086484 A086485 A086486 this_sequence A086488 A086489 A086490
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jul 28 2003
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EXTENSIONS
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More terms from David Wasserman (wasserma(AT)spawar.navy.mil), Mar 09 2005
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