---
id: 5900f4791000cf542c50ff8b
challengeType: 5
title: 'Problem 268: Counting numbers with at least four distinct prime factors less than 100'
videoUrl: ''
localeTitle: 问题268:计算至少有四个不同素因子小于100的数字
---
## Description
可以证实,有23个小于1000的正整数可被至少四个小于100的不同质数整除。