28748811

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1$

素因数の和:176

約数の個数: 64

約数和(自身を含む): 50462720

約数和(自身を除く): 21713909

約数列:

[1, 3, 7, 13, 21, 31, 39, 43, 79, 91, 93, 129, 217, 237, 273, 301, 403, 553, 559, 651, 903, 1027, 1209, 1333, 1659, 1677, 2449, 2821, 3081, 3397, 3913, 3999, 7189, 7347, 8463, 9331, 10191, 11739, 17143, 17329, 21567, 23779, 27993, 31837, 44161, 51429, 51987, 71337, 95511, 105307, 121303, 132483, 222859, 309127, 315921, 363909, 668577, 737149, 927381, 1368991, 2211447, 4106973, 9582937, 28748811]

約数ペア:

[(1, 28748811), (3, 9582937), (7, 4106973), (13, 2211447), (21, 1368991), (31, 927381), (39, 737149), (43, 668577), (79, 363909), (91, 315921), (93, 309127), (129, 222859), (217, 132483), (237, 121303), (273, 105307), (301, 95511), (403, 71337), (553, 51987), (559, 51429), (651, 44161), (903, 31837), (1027, 27993), (1209, 23779), (1333, 21567), (1659, 17329), (1677, 17143), (2449, 11739), (2821, 10191), (3081, 9331), (3397, 8463), (3913, 7347), (3999, 7189)]