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15
Task/Perfect-numbers/Icon/perfect-numbers.icon
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15
Task/Perfect-numbers/Icon/perfect-numbers.icon
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procedure main(arglist)
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limit := \arglist[1] | 100000
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write("Perfect numbers from 1 to ",limit,":")
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every write(isperfect(1 to limit))
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write("Done.")
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end
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procedure isperfect(n) #: returns n if n is perfect
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local sum,i
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every (sum := 0) +:= (n ~= divisors(n))
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if sum = n then return n
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end
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link factors
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