准完全数
准完全数(英语:quasi-perfect number),又称准完美数或准完备数,是一些特殊的自然数:它所有的非平凡因子(即除了1和自身以外的约数)的和,恰好等于它本身。准完全数是丰数。
参见
参考
- ^ Hagis, Peter; Cohen, Graeme L. Some results concerning quasiperfect numbers. J. Austral. Math. Soc. Ser. A. 1982, 33 (2): 275–286. MR 0668448. doi:10.1017/S1446788700018401.
外部链接
- Quasiperfect Number(页面存档备份,存于互联网档案馆), Wolfram MathWorld
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