261 (număr)

Pentru anul 261 al erei noastre, vedeți 261.
← 260 261 262 →
Cardinaldouă sute șaizeci și unu
Ordinal261-lea
două sute șaizeci și unulea
Factorizare32· 29
Divizori1, 3, 9, 29, 87, 261
Cifre romaneCCLXI
Binar1000001012
Ternar1002003
Cuaternar100114
Cvinariu20215
Senar11136
Octal4058
Duodecimal19912
Hexazecimal10516
VigesimalD120
Baza 367936
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261 (două sute șaizeci și unu) este numărul natural care urmează după 260 și precede pe 262 într-un șir crescător de numere naturale.

În matematică

261:

În știință

În astronomie

În alte domenii

261 se poate referi la:

  • Prefixul telefonic internațional pentru Madagascar.
  • H.261, un standard pentru compresiunea video

Note

  1. ^ Coman, Enciclopedia…, p. 22
  2. ^ Coman, Enciclopedia…, p. 27
  3. ^ Șirul A005100 la Enciclopedia electronică a șirurilor de numere întregi (OEIS)
  4. ^ Coman, Enciclopedia…, p. 40
  5. ^ Șirul A005349 la Enciclopedia electronică a șirurilor de numere întregi (OEIS)
  6. ^ Coman, Enciclopedia…, p. 55
  7. ^ Șirul A000959 la Enciclopedia electronică a șirurilor de numere întregi (OEIS)
  8. ^ Coman, Enciclopedia…, p. 125
  9. ^ Șirul A000069 la Enciclopedia electronică a șirurilor de numere întregi (OEIS)
  10. ^ en „Number Gossip: 261”. www.numbergossip.com. Accesat în . 
  11. ^ Coman, Enciclopedia…, p. 64
  12. ^ Șirul A001106 la Enciclopedia electronică a șirurilor de numere întregi (OEIS)
  13. ^ Coman, Enciclopedia…, p. 64
  14. ^ Șirul A051871 la Enciclopedia electronică a șirurilor de numere întregi (OEIS)
  15. ^ Coman, Enciclopedia…, p. 19
  16. ^ en Peter Turney, Unfolding the Tesseract, Journal of Recreational Mathematics, Vol. 17(1), 1984-85, accesat 2021-04-15

Bibliografie

  • Marius Coman, Enciclopedia matematică a claselor de numere întregi, Columbus, Ohio: Education Publishing, 2013, ISBN: 978-1-59973-237-4

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