proper factor A factor other than the number itself; so 1,2,3,6 are all factors of 6, but only 1, 2, and 3 are proper factors.
proper factor
数学辞典收录了4151条数学词条，基本涵盖了常用数学知识及数学英语单词词组的翻译及用法，是数学学习的有利工具。