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Search: id:A071395
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| A071395 |
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Primitive abundant numbers (abundant numbers all of whose proper divisors are deficient numbers). |
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+0
2
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| 20, 70, 88, 104, 272, 304, 368, 464, 550, 572, 650, 748, 836, 945, 1184, 1312, 1376, 1430, 1504, 1575, 1696, 1870, 1888, 1952, 2002, 2090, 2205, 2210, 2470, 2530, 2584, 2990, 3128, 3190, 3230, 3410, 3465, 3496, 3770, 3944, 4030, 4070, 4095, 4216, 4288
(list; graph; listen)
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OFFSET
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0,1
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REFERENCES
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Guy, R. K. Unsolved Problems in Number Theory, 2nd ed. New York: Springer-Verlag, p. 46, also section B2, 1994.
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LINKS
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Eric Weisstein's World of Mathematics, Primitive Abundant Number
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CROSSREFS
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Cf. A006038, A000396, A005100, A005101.
Adjacent sequences: A071392 A071393 A071394 this_sequence A071396 A071397 A071398
Sequence in context: A074632 A044158 A044539 this_sequence A053741 A052516 A083873
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KEYWORD
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nonn
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AUTHOR
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Joe McCauley (mccauley(AT)davesworld.net), Jun 12 2002
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