Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
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999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999 MŨ 99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999
9867555555555555555555754983748888888888888888888884444444444444448988000000000000000000000000000000000000000000000000480.....27777777777777777777779999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999
Ư(12) = { 1;2;3;4;6;12}
Vì 1+2+3+4+6 = 16 Vậy 12 không là số hoàn chỉnh.
Ư(28) = { 1;2;4;7;14;28 }
Vì 1+2+4+7+14 = 28 Vậy 28 là số hoàn chỉnh .
Ư(496) ={ 1;2;4;8;16 ;31;62;124;248;496}
Vì 1+2+4+8+16+31+62+124+248=496 Vậy 496 là số hoàn chỉnh.
12 có các ước không kể chính nó là :
1; 2; 3; 4; 6
Ta thấy 1 + 2 + 3 + 4 + 6 \(\ne\) 12. Vậy 12 không là số hoàn chỉnh.
Còn 28 và 496 là số hoàn chỉnh.
số sáu kia kìa
hàng thứ 6