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A073033
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A 4-cycle of the k => sigma(k)-k process, where sigma(k) is the sum of divisors of k (A000203).
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1
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18656380, 20522060, 28630036, 24289964, 18656380, 20522060, 28630036, 24289964, 18656380, 20522060, 28630036, 24289964, 18656380, 20522060, 28630036, 24289964, 18656380, 20522060, 28630036, 24289964, 18656380, 20522060, 28630036, 24289964
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OFFSET
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1,1
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COMMENTS
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18656380 = 2^2*5*932819, 20522060 = 2^2*5*13*17*4643, 28630036 = 2^2*19*449*839, 24289964 = 2^2*97*62603.
The cycle was discovered by Cohen (1970). - Amiram Eldar, Aug 18 2024
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LINKS
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PROG
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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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