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Naturaj nombroj


natura nombro9092dekuma sistemo












91 (nombro)




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Disambig-dark.svg"Naŭdek unu" alidirektas ĉi tien. Por la jaro, vidu la paĝon 91.



Naŭdek unu (91) estas la natura nombro kiu sekvas 90 kaj antaŭas 92.


La nombro 91 en la dekuma sistemo havas alternativajn formojn:


  • en duuma sistemo : 1011011

  • en okuma sistemo : 133

  • en deksesuma sistemo : 5B


en matematiko |


  • 91 ne estas primo. 91 = 13·7

  • 91 estas la sesa kvadrata piramida nombro


pri la nombro 91 |


  • La atomnumero de Protaktinio.


Vidu ankaŭ |









Elŝutita el "https://eo.wikipedia.org/w/index.php?title=91_(nombro)&oldid=5310591"













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