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Search: id:A048258
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| A048258 |
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Integers whose sum of divisors is an 8th power. |
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+0
2
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| 1, 217, 57337, 600270, 621690, 669990, 685290, 693294, 693770, 699810, 725934, 747670, 769930, 774894, 782598, 805970, 813378, 823938, 835670, 839802, 854930, 865490, 873334, 895594, 918435, 920414, 923410, 931634, 935715, 959565, 965174
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OFFSET
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1,2
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FORMULA
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Sigma [ 1, a[ n ] ] = x^8, where the initial values of x are 1, 2, 4, 6 (occurs 85 times), ...
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EXAMPLE
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Divisors[ 217 ]={1,7,31,217}, sum=256. Divisors[ 57337 ]={1,7,8191,57337}, sum=65536. Divisors[ 1676377 ]={1,647,2591,1676377}, sum=6^8.
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CROSSREFS
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A006532, A020477, A019422, A019423, A018427, A048251- A048257.
Sequence in context: A020251 A086026 A100794 this_sequence A038662 A121379 A131660
Adjacent sequences: A048255 A048256 A048257 this_sequence A048259 A048260 A048261
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu)
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