The largest positive integer that must divide nn, means for the least value of nn which satisfies the given statement in the question. The lowest square of an integer, which is multiple of 7272 is 144144 --> n2=144=122=72∗2n2=144=122=72∗2 --> nmin=12nmin=12. Largest factor of 1212 is 1212.
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后半句是说n能整除的最大整数，就是n
n能整除最大的数是12
48不也可以除12？
解释的太棒了，这道题就错选了48登录 或 注册 后可以参加讨论