81928287

素因数分解:

$3^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{593}}^1$

素因数の和:669

約数の個数: 64

約数和(自身を含む): 150543360

約数和(自身を除く): 68615073

約数列:

[1, 3, 7, 9, 17, 21, 27, 43, 51, 63, 119, 129, 153, 189, 301, 357, 387, 459, 593, 731, 903, 1071, 1161, 1779, 2193, 2709, 3213, 4151, 5117, 5337, 6579, 8127, 10081, 12453, 15351, 16011, 19737, 25499, 30243, 37359, 46053, 70567, 76497, 90729, 112077, 138159, 178493, 211701, 229491, 272187, 433483, 535479, 635103, 688473, 1300449, 1606437, 1905309, 3034381, 3901347, 4819311, 9103143, 11704041, 27309429, 81928287]

約数ペア:

[(1, 81928287), (3, 27309429), (7, 11704041), (9, 9103143), (17, 4819311), (21, 3901347), (27, 3034381), (43, 1905309), (51, 1606437), (63, 1300449), (119, 688473), (129, 635103), (153, 535479), (189, 433483), (301, 272187), (357, 229491), (387, 211701), (459, 178493), (593, 138159), (731, 112077), (903, 90729), (1071, 76497), (1161, 70567), (1779, 46053), (2193, 37359), (2709, 30243), (3213, 25499), (4151, 19737), (5117, 16011), (5337, 15351), (6579, 12453), (8127, 10081)]