41
41是40搭42之间个自然数。
- 第13个素数。前一个为37、下一个为43。
- 第27个无平方数约数个数。前一个为39、下一个为42。
- 第23个十进制个等数位数。前一个为37、下一个为43。
- 铌个原子序数。
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