21365127

素因数分解:

$3^4\times 7^3\times {\mathrm{769}}^1$

素因数の和:802

約数の個数: 40

約数和(自身を含む): 37268000

約数和(自身を除く): 15902873

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 343, 441, 567, 769, 1029, 1323, 2307, 3087, 3969, 5383, 6921, 9261, 16149, 20763, 27783, 37681, 48447, 62289, 113043, 145341, 263767, 339129, 436023, 791301, 1017387, 2373903, 3052161, 7121709, 21365127]

約数ペア:

[(1, 21365127), (3, 7121709), (7, 3052161), (9, 2373903), (21, 1017387), (27, 791301), (49, 436023), (63, 339129), (81, 263767), (147, 145341), (189, 113043), (343, 62289), (441, 48447), (567, 37681), (769, 27783), (1029, 20763), (1323, 16149), (2307, 9261), (3087, 6921), (3969, 5383)]