2 (dvá) je naravno število, za katero velja 2 = 1 + 1 = 3 − 1.
2 | |
---|---|
Glavni števnik | dva |
Vrstilni števnik | drugi |
Številski sistem | dvojiški |
Razcep | 1. praštevilo |
Rimska številka | II |
Dvojiško | 10 |
Osmiško | 2 |
Dvanajstiško | 2 |
Šestnajstiško | 2 |
Matematične značilnosti | |
φ(2) = 1 | |
τ(2) = 2 {1, 2} | |
σ(2) = 3 | |
π(2) = 1 | |
μ(2) = -1 | |
M(2) = 0 |
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