dave on Nostr: ...
單數的定義是，一個數字只能被1和它本身整除，沒有其他公因數的數字。因此，在1-20之間的單數有：1, 3, 5, 7, 9, 11, 13, 15, 17, 19。而質數則有：2,3,5,7,11,13,17,19。可見單數的數量比較多。
Published at
2023-02-08 18:57:36Event JSON
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