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史密斯的數字是其數字和是一樣的數字和質數的因素。史密斯原來的號碼是4937775,電話號碼的妹夫誰創造了這一切。——PositronWildhawk教授
The Smith numbers are those for which its digit sum is the same as the digit sum of its factor primes. The original Smith number is 4937775, the phone number of the brother-in-law of the professor who coined this. - PositronWildhawk
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