The structure of finite groups is widely used in various fields and has a great influence on various disciplines. The object of this article is to classify these groups whose number of elements of maximal order of is 20.

中文翻译：

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具有20个最大阶元素的有限群

有限群的结构广泛应用于各个领域，对各个学科都有很大的影响。本文的目的是对最大数量为20的元素的这些组进行分类。