The folowing table expresses '309' in various number bases. 'DRx' shows the result of 'digit reducing' resulting in an X-digit long number.
| Base | DR9 | DR8 | DR7 | DR6 | DR5 | DR4 | DR3 | DR2 | DR1 |
|---|---|---|---|---|---|---|---|---|---|
| 2 | 100110101 | 101 | 10 | 1 | |||||
| 3 | 102110 | 12,10 | 1 | ||||||
| 4 | 10311 | 12 | 3 | ||||||
| 5 | 2214 | 14,10 | 1 | ||||||
| 6 | 1233 | 13 | 4 | ||||||
| 7 | 621 | 12 | 3 | ||||||
| 8 | 465 | 17,10 | 1 | ||||||
| 9 | 373 | 14 | 5 | ||||||
| 10 | 309 | 12 | 3 | ||||||
| 11 | 261 | 9 | |||||||
| 12 | 219 | 10 | 1 | ||||||
| 13 | 1AA | 18 | 9 | ||||||
| 14 | 181 | A | |||||||
| 15 | 159 | 10 | 1 | ||||||
| 16 | 135 | 9 |
Factors: 3 * 103