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。
dave /
npub1tsg…htk4
2023-02-08 18:57:36
in reply to nevent1q…x6qy
Author Public Key
npub1tsgw6pncspg4d5u778hk63s3pls70evs4czfsmx0fzap9xwt203qtkhtk4Published at
2023-02-08 18:57:36Event JSON
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"content": "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。",
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