Prime factor of 19
- Prime factor of 196
- Prime factor of 198
- Prime factor of 192
- Prime factor of 195
- Prime factor of 190
- Prime factor of 1955
- Prime factor of 197
- Prime factor of 1936
- Prime factor of 1980
- Prime factor of 19683
- Prime factor of 194
- Prime factor of 1944
- Prime factor of 191
- Prime factor of 193
- Prime factor of 199