Last Updated
：2026/01/09
階乗
Hiragana
かいじょう
Noun
Japanese Meaning
階乗とは，1からその数までの連続する正の整数をすべて掛け合わせた値を表す数学用語で，記号「!」で表される（例：5! = 1×2×3×4×5）。 / 順列・組合せ・確率論などの分野で，ある数に対して取りうる並べ方や選び方の総数を計算するときに用いられる基本的な概念。
Easy Japanese Meaning
あるかずとそれよりちいさいかずをいちまでじゅんにかけたもの
Chinese (Simplified) Meaning
自然数从1到n的连乘积（n!） / 组合数学中的计数函数——阶乘
Chinese (Traditional) Meaning
數學：正整數從 1 乘到該數的連乘積 / 表示為 n! 的運算或其值
Korean Meaning
정수 n에서 1까지의 양의 정수의 곱 / 조합론에서 순열·조합 계산에 쓰이는 곱
Indonesian
faktorial (n!) / hasil kali berurutan dari 1 sampai n
Vietnamese Meaning
giai thừa (n!): tích các số nguyên dương từ 1 đến n / phép tính giai thừa trong tổ hợp
Tagalog Meaning
faktoryal (sa kombinatorika) / produkto ng magkakasunod na positibong bilang mula 1 hanggang n
Sense（1）
(combinatorics) factorial
（ canonical ）
（ romanization ）
（ hiragana ）
Quizzes for review
See correct answer
階乗
See correct answer
I needed to calculate the factorial of 5 for a math problem.
I needed to calculate the factorial of 5 for a math problem.
See correct answer
数学の問題で、5の階乗を計算する必要がありました。
Japanese - English
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