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 A096290 Prime power perfect numbers: If n=Product p_i^r_i let PPsigma(n)= Product {Sum p_i^s_i, 2<=s_i<=r_i, s_i is prime}; sequence gives numbers n such that PPsigma(n)=2*n. 5
 216, 5400, 10584, 26136, 36504, 62424, 77976, 114264, 181656, 207576, 264600, 295704, 363096, 399384, 477144, 606744, 653400, 751896, 803736, 912600, 969624, 1088856, 1149984, 1151064, 1280664, 1348056, 1488024, 1560600, 1710936, 1788696 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE Example: 5400 is in the sequence because 5400=2^3*3^3*5^2 and (2^2+2^3)*(3^2+3^3)*(5^2)=2*5400. CROSSREFS Cf. A100509. Sequence in context: A183617 A114060 A128964 * A246896 A017595 A232835 Adjacent sequences:  A096287 A096288 A096289 * A096291 A096292 A096293 KEYWORD nonn AUTHOR Yasutoshi Kohmoto, Jun 24 2004 EXTENSIONS Corrected and extended by Farideh Firoozbakht, Nov 17 2004 STATUS approved

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Last modified September 26 23:42 EDT 2021. Contains 347673 sequences. (Running on oeis4.)