# Descartes number

> odd number which would have been a perfect number if one of its composite factors were prime

**Wikidata**: [Q15402251](https://www.wikidata.org/wiki/Q15402251)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Descartes_number)  
**Source**: https://4ort.xyz/entity/descartes-number