15 lines
528 B
OCaml
15 lines
528 B
OCaml
(* use the module to calculate perfect numbers *)
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let () =
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for i = 2 to 1 lsl 19 do
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let sum = ref (Frac.frac 1 i) in
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for factor = 2 to truncate (sqrt (float i)) do
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if i mod factor = 0 then
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Frac.(
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sum := !sum +/ frac 1 factor +/ frac 1 (i / factor)
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)
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done;
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if Frac.is_int !sum then
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Printf.printf "Sum of reciprocal factors of %d = %s exactly %s\n%!"
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i (Frac.to_string !sum) (if Frac.to_string !sum = "1" then "perfect!" else "")
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done
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