Chwech
 | |
| Enghraifft o: | rhif naturiol, perfect number, rhif triongl, automorphic number, rhif cyfansawdd, eilrif, centered pentachoric number, centered pentagonal number, hexagonal number, pentagonal pyramidal number, pronic number, highly touchable number, strictly non-palindromic number, harshad number, semiprime, antisquare number, Trimorphic number  |
|---|---|
| Rhagflaenwyd gan | pump |
| Olynwyd gan | saith |
 Ffeiliau perthnasol ar Gomin Wicimedia | |
