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Find the number of odd proper divisors of `3^pxx6^mxx21^ndot`

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Knowledge Check

  • The number of odd proper divisors of 3^(p)*6^(m)*21^(n) is

    A
    `(p+1)(m+1)(n+1)-2`
    B
    `(p+m+n+1)(n+1)-1`
    C
    `(p+1)(m+1)(n+1)-1`
    D
    `(p+m+n+1)(n+1)-2`
  • The number of proper divisors of 2520, is

    A
    46
    B
    52
    C
    64
    D
    none of these
  • The number of even proper divisors of 5040, is

    A
    48
    B
    47
    C
    46
    D
    none of these
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