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史密斯的数字是其数字和是一样的数字和质数的因素。史密斯原来的号码是4937775,电话号码的妹夫谁创造了这一切。——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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