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A348035
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Multiply-perfect numbers k that have a unitary divisor d such that sigma(d)*d = k.
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3
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1, 6, 28, 120, 496, 672, 8128, 523776, 33550336, 1379454720, 8589869056, 137438691328, 2305843008139952128, 203820700083634254643200, 2658455991569831744654692615953842176
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OFFSET
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1,2
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COMMENTS
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At least the even terms of A000396 are all present, thus if there are an infinite number of Mersenne primes (A000668), then it implies that this sequence is infinite as well.
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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