2. 外语
  3. n=l × 19³ Column A Column B The number of distinct 10 positive factors of n

n=l × 19³ Column A Column B The number of distinct 10 positive factors of n

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问题 n=l × 19³

Column A                       Column B
The number of distinct           10
positive factors of n
选项 A、if the quantity in Column A is greater
B、if the quantity in Column B is greater
C、if the two quantity are equal
D、if the relationship cannot be determined from the information given
答案B
解析 本题的正确答案为(B)。该题也就是让考生求n的正因子(positive factor)的个数。因子求解法则是：

因子数=(x+1)×(y+1)×(z+1)；根据此法则可得n的因子个数为(1+1)×(3+1)=8
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