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A309227
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Quasi-sociable numbers.
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1
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OFFSET
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1,1
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COMMENTS
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The smallest quasi-sociable number cycle is {1215571544, 1270824975, 1467511664, 1530808335, 1579407344, 1638031815, 1727239544, 151258717, 1215571544}. They are the only known quasi-sociable numbers in 2019.
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LINKS
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EXAMPLE
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1215571544 = 2^3 * 11 * 13813313
1270824975 = 3^2 * 5^2 * 7 * 19 * 42467
1467511664 = 2^4 * 19 * 599 * 8059
1530808335 = 3^3 * 5 * 7 * 1619903
1579407344 = 2^4 * 31^2 * 59 * 1741
1638031815 = 3^4 * 5 * 7 * 521 * 1109
1727239544 = 2^3 * 2671 * 80833
1512587175 = 3 * 5^2 * 11 * 1833439
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CROSSREFS
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Cf. A122726 (sociable numbers), A005276 (betrothed (or quasi-amicable) numbers).
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KEYWORD
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nonn,hard
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AUTHOR
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STATUS
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approved
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