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Search: id:A052021
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A052021 Sum of digits of n is the largest prime factor of n. +0
7
12, 50, 70, 308, 320, 364, 476, 500, 605, 700, 704, 715, 832, 935, 1088, 1183, 1547, 1729, 2401, 2584, 2618, 2704, 2926, 3080, 3200, 3536, 3640, 3952, 4225, 4760, 4784, 4913, 5000, 5491, 5525, 5819, 5831, 6050, 6175, 6517, 6647, 7000, 7040, 7150, 7475 (list; graph; listen)
OFFSET

0,1

EXAMPLE

E.g. 13685 has sum of digits '23' and 13685 = 5.7.17.'23'.

CROSSREFS

Cf. A052018, A052019, A052020, A052022, A007953, A005349, A028834.

Adjacent sequences: A052018 A052019 A052020 this_sequence A052022 A052023 A052024

Sequence in context: A041274 A029586 A081292 this_sequence A052022 A110907 A009937

KEYWORD

nonn,base,nice

AUTHOR

Patrick De Geest (pdg(AT)worldofnumbers.com), Nov 15 1999.

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Last modified November 8 20:39 EST 2009. Contains 166234 sequences.


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