Prime Factorization Calculator - Prime Test, Factors, and Divisor List

Test if a number is prime and get its full prime factorization plus divisor list

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注意: 下記のツールインターフェースは現時点で英語のみに対応しています。UI の翻訳は順次進めています。 このツールを英語で見る →
Prime?
No - 360 is composite
Prime factorization
360 = 2^3 × 3^2 × 5
Distinct primes: 2, 3, 5
Divisors (24)
1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 90, 120, 180, 360
Trial division up to √n. Divisor list shown only when n ≤ 1,000,000 to keep the page fast.
あくまで推定値です。 計算結果は入力値に基づく一般的な式から生成された、情報提供のみを目的とするものです。金融、税務、法律、医療、または専門的な助言ではなく、個々の状況、管轄、税金、手数料、健康状態を考慮していません。重要な数値は必ず有資格の専門家に確認してください。本ツールの利用により、以下に同意したものとみなされます: 利用規約と免責事項.

使い方

  1. 1
    Enter a number

    Any positive integer up to 1 trillion.

  2. 2
    Read prime test

    The tool tells you immediately whether the number is prime or composite.

  3. 3
    Read factorization & divisors

    Composite numbers show their full prime factorization; numbers up to 1,000,000 also show the complete divisor list.

Prime Factorization Calculator - Prime Test, Factors, and Divisor List について

Free prime factorization calculator. Enter any integer from 1 to 1,000,000,000,000 to check whether it is prime, get its complete prime factorization in exponent form (e.g. 360 = 2³ × 3² × 5), and (for smaller numbers) see the full list of divisors. Uses efficient trial division. Runs entirely in your browser. 712 Tools の Prime Factorization Calculator - Prime Test, Factors, and Divisor List はモダンな JavaScript API を使って完全にブラウザ内で動作します - サーバーがあなたのデータを見ることは一切ありません。つまり、即時の結果、完全なプライバシー、アップロード制限なしです。

デバッグ、簡単な確認、あるいは本番のインシデント対応まで - このツールは何度でも無料で使えます。ウォーターマークなし、サインアップなし、ツール内広告なし。

よくある質問

How does the tool factor large numbers?

Trial division up to the square root - fast enough for numbers up to about a trillion in the browser. Very large semiprimes would need more advanced algorithms.

Why is 1 not prime?

By convention. A prime has exactly two distinct positive divisors (1 and itself); 1 only has one.

Is my data uploaded?

No. All calculations run entirely in your browser.

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