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Zanimljivosti o brojevima

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5 years 10 months ago #161 by xy2
312 je broj djeljiv sa zbirom svojih cifri

312:6=52

312 = 0!*5! + 1!*4! + 2!*3! + 3!*2! + 4!*1! + 5!*0!

Jednak je zbiru kvadrata 3 broja

312=42+102+14

312=28+56

312=23*13*3

kvadrat broja 312 jednak je zbiru kubova brojeva od 14 do 25

3122=143+153+163+173+183+193+203+213+223+233+243+253

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