18678751

素因数分解:

$7^3\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1$

素因数の和:164

約数の個数: 32

約数和(自身を含む): 24192000

約数和(自身を除く): 5513249

約数列:

[1, 7, 13, 49, 59, 71, 91, 343, 413, 497, 637, 767, 923, 2891, 3479, 4189, 4459, 5369, 6461, 20237, 24353, 29323, 37583, 45227, 54457, 205261, 263081, 316589, 381199, 1436827, 2668393, 18678751]

約数ペア:

[(1, 18678751), (7, 2668393), (13, 1436827), (49, 381199), (59, 316589), (71, 263081), (91, 205261), (343, 54457), (413, 45227), (497, 37583), (637, 29323), (767, 24353), (923, 20237), (2891, 6461), (3479, 5369), (4189, 4459)]