正规数 (整数)
正规数（Regular numbers）是指可以整除60的乘幂的整数，也就是60乘幂的约数，例如602 = 3600 = 48 × 75，48和75都可以整除60的平方，也都是正规数。
在许多数学及应用的领域会用到60乘幂的约数，在不同的领域中其名称也有所不同。
注释
- ^ Inspired by similar diagrams by Erkki Kurenniemi in "Chords, scales, and divisor lattices" （页面存档备份，存于互联网档案馆）.
参考资料
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