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69 10 ( 0 9) . \( 69^2 = 4761 \) \( 69^3 = 328509 \) : 4 7 6 1 3 2 8 5 0 9 : 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. . 69 , ( ). (happy number) , 1. : \( 6^2 + 9^2 = 36 + 81 = 117 \) \( 1^2 + 1^2 + 7^2 = 1 + 1 + 49 = 51 \) \( 5^2 + 1^2 = 25 + 1 = 26 \) \( 2^2 + 6^2 = 4 + 36 = 40 \) \( 4^2 + 0^2 = 16 \) \( 1^2 + 6^2 = 37 \) \( 3^2 + 7^2 = 9 + 49 = 58 \) \( 5^2 + 8^2 = 25 + 64 = 89 \) \( 8^2 + 9^2 = 64 + 81 = 145 \) , 1. (odious number) 69 : \( 69_{10} = 1000101_2 \) ( ). (Ulam number) : 1 2 , , . 69 . 180 69 (6 9, 9 6). ( 69, 96, 11, 88 ). 69! , (10¹⁰⁰). \( 69! < 10^{100} \), \( 70! > 10^{100} \). \( 69 = 3 \times 23 \) ( ). , 180 . : 1000101 : 105 : 45 |
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