A075659 Sum of prime divisors (A008472) is a power of an integer with exponent greater than 1.

14, 15, 28, 39, 45, 46, 55, 56, 66, 75, 87, 92, 94, 98, 112, 117, 132, 135, 155, 158, 183, 184, 186, 188, 196, 198, 203, 224, 225, 247, 255, 261, 264, 275, 285, 290, 291, 295, 299, 316, 322, 323, 334, 351, 354, 357, 368, 372, 375, 376, 392, 396, 405, 418, 429

Offset

1,1

Links

Michel Marcus, Table of n, a(n) for n = 1..5000

Prog

(PARI) isok(n) = {my(f=factor(n)); ispower(sum(k=1, #f~, f[k, 1])); } \\ Michel Marcus, Sep 09 2017

Crossrefs

Cf. A008472, A001597.

Sequence in context: A207036 A087430 A085900 * A022104 A041398 A041919

Adjacent sequences: A075656 A075657 A075658 * A075660 A075661 A075662

Keyword

nonn

Author

Floor van Lamoen, Sep 23 2002

Extensions

More terms from Matthew Conroy, Oct 15 2002

Offset corrected by Michel Marcus, Sep 09 2017

Status

approved