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Lê Quốc Trần Anh Coordinator

24/05/2018 at 09:58
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Let K = 168 × 900 = 151,200. How many positive integer divisors does K have?




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  • ...
    Huy Toàn 8A (TL) 25/05/2018 at 02:40

    We have:

    K = 25 . 33 . 52 . 7

    The positive integers of K are : 

    (5 + 1) . (3 + 1) . (2 + 1) . (1 + 1) = 144 to wish

    Answer : ...

  • ...
    Nguyễn Thành Long 26/05/2018 at 08:40

    Ta phân tích ra thừa số nguyên tố : 

                 \(151200=2^5\times3^3\times5^2\times7^1\)

    Số ước là :                               (5+1).(3+1).(2+1).(1+1)=144 ( ước )

    Vậy có 144 ước .


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