13 lines
360 B
Python
13 lines
360 B
Python
>>> def proper_divs2(n):
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... return {x for x in range(1, (n + 1) // 2 + 1) if n % x == 0 and n != x}
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...
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>>> [proper_divs2(n) for n in range(1, 11)]
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[set(), {1}, {1}, {1, 2}, {1}, {1, 2, 3}, {1}, {1, 2, 4}, {1, 3}, {1, 2, 5}]
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>>>
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>>> n, length = max(((n, len(proper_divs2(n))) for n in range(1, 20001)), key=lambda pd: pd[1])
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>>> n
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15120
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>>> length
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79
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>>>
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