naravno število From Wikipedia, the free encyclopedia
90 (devétdeset) je naravno število, za katero velja 90 = 89 + 1 = 91 - 1.
| |||
Glavni števnik | devetdeset | ||
Vrstilni števnik | devetdeseti | ||
Razcep | |||
Rimska številka | XC | ||
Dvojiško | 1011010 | ||
Šestnajstiško | 5A | ||
Matematične lastnosti | |||
---|---|---|---|
φ(90) = 24 | |||
τ(90) = 12 {1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90} | |||
σ(90) = 234 | |||
π(90) = 24 | |||
μ(90) = 0 | |||
M(90) = -2 |
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