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Ingy döt Net 2023-07-01 11:58:00 -04:00
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Task/Perfect-numbers/Racket/perfect-numbers.rkt Normal file
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#lang racket
(require math)
(define (perfect? n)
(=
(* n 2)
(sum (divisors n))))
; filtering to only even numbers for better performance
(filter perfect? (filter even? (range 1e5)))
;-> '(0 6 28 496 8128)