IntegerExponent
 Usage
• IntegerExponent[n, b]给出b除n的最高幂。
Notes
• IntegerExponent[n] 等于 IntegerExponent[n, 10]. • IntegerExponent[n, b] 以b进制给出n的数字中尾数为0的数.
 Further Examples
This shows that the highest power of  that divides  ! is  .
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Here is another way to express this.
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