# Prime Factorization

> Integer factorization app calculating prime factors, divisors, and number properties. (iPhone/iPad app by Sohei Mori.)

- Source: https://appshunter.io/ios/app/prime-factorization/id528980227 (this page in markdown: same URL + `.md`)
- Developer: [Sohei Mori](https://appshunter.io/developer/528980270)
- Category: Utilities, Education
- Price: Free
- Rating: 4.40/5 from 5 App Store ratings · 21 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 2 MB
- Languages: American English, Japanese
- Released: 2012-05-26
- Data updated: 2026-08-28
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/prime-factorization/id528980227/reviews.md

## What is Prime Factorization?

This app factorize inputted integer to primes. You can input and factorize any integers under 100 million.
App will show below result.

* The result of prime factorization
* The number of divisors
* The sum total of divisors
* All Divisors

In addition, you can know which inputted number is "Prime number", "Perfect Number", "Multipru Perfect Number", "Abundant Number"or "Dificient Number".

## Key features

- Prime factorization of integers
- Calculate number of divisors
- Sum of divisors calculation
- List all divisors
- Identify prime numbers
- Identify perfect, abundant, deficient numbers

## Recent user reviews (10 of 21)

All indexed reviews: https://appshunter.io/ios/app/prime-factorization/id528980227/reviews.md

### 5/5 — Really helps me with math

*2025-03-31, version 1.3*

This is the only type of math I like thank you I have been looking for this

### 5/5 — 無駄のない良いアプリ

*2024-06-20*

ありがとう

### 5/5 — バグ？

*2020-12-26*

2を素因数分解すると2000が素因数分解されます。

### 5/5 — めっちゃ良い！

*2020-08-04*

これめっちゃ良い！めっちゃ便利だった！まだレビューとかインストールしてる人とか少ないけどもっとみんな入れるべきだと思う！！

### 5/5 — Well done

*2019-04-27*

Gives primes, perfect, abundant, and deficient numbers in background. Also n-fold perfect numbers.  Easy to use and aesthetic.

### 5/5 — Great to have!

*2019-02-28*

This totally saved me on my homework assignment!🤣.

### 5/5 — Love

*2019-02-25*

ハーバードでも使ってます. I love this!!!!!!!

### 5/5 — すげーー

*2019-01-23*

感動
入試の問題これあれば解けたのにーーwww

### 5/5 — 重宝します

*2016-02-21*

有料のものもあるようですが、無料で素因数分解できる数少ないアプリなので重宝しています。

### 5/5 — Very helpful

*2015-05-11*

Great for schoolwork or anything involving prime factorization

## Frequently asked questions about Prime Factorization

### What is the maximum integer Prime Factorization can factorize?

Prime Factorization can factorize any integer under 100 million. This allows for a wide range of calculations within the app's capabilities.

### What additional number properties can Prime Factorization identify?

Beyond prime factorization, Prime Factorization can identify if a number is a Prime number, Perfect Number, Multipru Perfect Number, Abundant Number, or Dificient Number.

### Does Prime Factorization have ads?

No, Prime Factorization is ad-free, providing an uninterrupted user experience for mathematical calculations.

### What information is displayed after factorizing an integer with Prime Factorization?

After factorizing, the app displays the prime factorization result, the number of divisors, the sum of divisors, and a list of all divisors.

### On which devices can Prime Factorization be used?

Prime Factorization is supported on iPhone and iPod devices, making it accessible for users within the Apple ecosystem.

### How often is Prime Factorization updated?

The latest version of Prime Factorization is 1.3, last updated on March 12, 2018. While not frequently updated recently, it remains a functional utility.

### What is the age rating for Prime Factorization?

Prime Factorization has an age rating of 4+, indicating it is suitable for users of all ages.

### What is the user sentiment for Prime Factorization based on its rating?

Prime Factorization is highly regarded by its users, holding a rating of 4.4 stars from 5 ratings, suggesting a positive user experience.

## Version history (last 4 releases)

### 1.3 — 2018-03-12

This app has been updated by Apple to display the Apple Watch app icon.

become available for iOS 11

### 1.2 — 2012-09-11

Changed: view of divisors.

### 1.1 — 2012-06-07

*Localized for English
*Updated app icon

### 1.0 — 2012-05-26

No release notes.

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## More apps by Sohei Mori

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All apps by Sohei Mori: https://appshunter.io/developer/528980270

## Related topics

[prime factorization](https://appshunter.io/ios/topics/prime-factorization) · [factorization](https://appshunter.io/ios/topics/factorization) · [prime factorization factorizer](https://appshunter.io/ios/topics/prime-factorization-factorizer) · [6144](https://appshunter.io/ios/topics/6144)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-28.*