最大公約数 さいだいこうやくすう Meanings Noun greatest common divisor; GCD Kanji 最 most. Read as サイ. 大 big. Read as ダイ. 公 public. Read as コウ. 約 promise. Read as ヤク. 数 number. Read as スウ. Word lists Mathematics Jinuma: Japanese Dictionary · Word lists