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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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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; refs; listen; history; internal format)
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OFFSET
| 1,1
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REFERENCES
| 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
| Donovan Johnson, Table of n, a(n) for n = 1..10000
Eric Weisstein's World of Mathematics, Primitive Abundant Number
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CROSSREFS
| Cf. A006038, A000396, A005100, A005101.
Sequence in context: A044158 A044539 A153728 * A053741 A052516 A083873
Adjacent sequences: A071392 A071393 A071394 * A071396 A071397 A071398
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KEYWORD
| nonn
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AUTHOR
| Joe McCauley (mccauley(AT)davesworld.net), Jun 12 2002
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EXTENSIONS
| Offset corrected by Donovan Johnson (donovan.johnson(AT)yahoo.com), Aug 28 2011
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