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Initial data commit

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Ingy döt Net 2023-07-01 11:58:00 -04:00
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Task/Arithmetic-Rational/EchoLisp/arithmetic-rational-1.l Normal file
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;; Finding perfect numbers
(define (sum/inv n) ;; look for div's in [2..sqrt(n)] and add 1/n
(for/fold (acc (/ n)) [(i (in-range 2 (sqrt n)))]
#:break (> acc 1) ; no hope
(when (zero? (modulo n i ))
(set! acc (+ acc (/ i) (/ i n))))))