Proper divisors: Difference between revisions
→{{header|Ruby}}: `require` relocated
(A too narrow minded view. It need not be a subset.) |
(→{{header|Ruby}}: `require` relocated) |
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=={{header|Ruby}}==
<lang ruby>
class Integer
def proper_divisors
▲ require "prime"
return [] if self == 1
res = [1]
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