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Search: id:A004607
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| A004607 |
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Infinitary sociable numbers (smallest member of cycle). |
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+0
3
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| 1026, 10098, 10260, 12420, 41800, 45696, 100980, 241824, 448800, 512946, 685440, 830568, 4938136, 6732000, 9424800, 12647808, 13959680, 14958944, 17878998, 25581600, 28158165, 32440716, 36072320, 55204500, 74062944
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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If n = product p_i^a_i, d = product p_i^c_i is an infinitary divisor of n if each c_i has a zero bit in its binary representation everywhere that the corresponding a_i does.
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REFERENCES
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G. L. Cohen, On an integer's infinitary divisors, Math. Comp. 54 (1990), 395-411.
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LINKS
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J. O. M. Pedersen, Tables of Aliquot Cycles
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CROSSREFS
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Cf. A003416.
Sequence in context: A023002 A103716 A031530 this_sequence A066133 A119455 A045031
Adjacent sequences: A004604 A004605 A004606 this_sequence A004608 A004609 A004610
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KEYWORD
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nonn,nice
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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