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2016-07-06T11:52:11+08:00
In mathematics, a square-free, or quadratfrei (from German languageinteger, is an integer which is divisible by no otherperfect square than 1. For example, 10 is square-free but 18 is not, as 18 is divisible by 9 = 32. The smallest positive square-free numbers are
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