The folowing table expresses '138' in various number bases. 'DRx' shows the result of 'digit reducing' resulting in an X-digit long number.
| Base | DR8 | DR7 | DR6 | DR5 | DR4 | DR3 | DR2 | DR1 |
|---|---|---|---|---|---|---|---|---|
| 2 | 10001010 | 11,10 | 1 | |||||
| 3 | 12010 | 11 | 2 | |||||
| 4 | 2022 | 12 | 3 | |||||
| 5 | 1023 | 11 | 2 | |||||
| 6 | 350 | 12 | 3 | |||||
| 7 | 255 | 15 | 6 | |||||
| 8 | 212 | 5 | ||||||
| 9 | 163 | 11 | 2 | |||||
| 10 | 138 | 12 | 3 | |||||
| 11 | 116 | 8 | ||||||
| 12 | B6,15 | 6 | ||||||
| 13 | A8,15 | 6 | ||||||
| 14 | 9C,17 | 8 | ||||||
| 15 | 93 | C | ||||||
| 16 | 8A,12 | 3 |
Factors: 2 * 3 * 23