- 最大公因子 zuìdàgōngyīnzǐ greatest common divisorThe largest positive integer that divides each of two or more non-zero integers without a remainder.
- 公因子 gōngyīnzǐ common factor(math.) common factor
- 插入因子 chārùyīnzǐ insertion element(genetics) insertion element
- 类风湿因子 lèifēngshīyīnzǐ rheumatoid factor
- 细胞因子 xìbāoyīnzǐ cytokine
- 影响因子 yǐngxiǎngyīnzǐ impact factorimpact factor (of an academic journal)