21405357

素因数分解:

$3^3\times {\mathrm{43}}^1\times {\mathrm{103}}^1\times {\mathrm{179}}^1$

素因数の和:334

約数の個数: 32

約数和(自身を含む): 32947200

約数和(自身を除く): 11541843

約数列:

[1, 3, 9, 27, 43, 103, 129, 179, 309, 387, 537, 927, 1161, 1611, 2781, 4429, 4833, 7697, 13287, 18437, 23091, 39861, 55311, 69273, 119583, 165933, 207819, 497799, 792791, 2378373, 7135119, 21405357]

約数ペア:

[(1, 21405357), (3, 7135119), (9, 2378373), (27, 792791), (43, 497799), (103, 207819), (129, 165933), (179, 119583), (309, 69273), (387, 55311), (537, 39861), (927, 23091), (1161, 18437), (1611, 13287), (2781, 7697), (4429, 4833)]