Viginti unus Nexus externi | Tabula navigationisDe numero viginti unoAmplifica

Numeri triangulares


numerus naturalisimparbinarianumerus triangularisFibonaccianusMotzkinianusfactoresprimosquadratorum




Haec pagina est de numero.

Ut de anno legas, vide 21.



Viginti unus pagii (famuli) conventus legiferi Ontariensis





Frederica Foglia, pellicularum moderatrix, numerum 21 gerens


Viginti unus, seu unus et viginti (numeris Arabicis 21, Romanis XXI, Graecis ΚΑʹ) est numerus naturalis et impar inter 20 et 22. Forma binaria est 10101. 21 est numerus triangularis, Fibonaccianus, et Motzkinianus.


21 in factores primos 3×7 resolvitur. Etiam summa est trium quadratorum: 12 + 22 + 42.



Nexus externi |



  • De numero viginti uno apud Wolfram Alpha

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mathematica
Haec stipula ad mathematicam spectat. Amplifica, si potes!

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