20971727

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{103}}^1$

素因数の和:215

約数の個数: 32

約数和(自身を含む): 26956800

約数和(自身を除く): 5985073

約数列:

[1, 7, 17, 29, 59, 103, 119, 203, 413, 493, 721, 1003, 1711, 1751, 2987, 3451, 6077, 7021, 11977, 12257, 20909, 29087, 42539, 50779, 103309, 176233, 203609, 355453, 723163, 1233631, 2995961, 20971727]

約数ペア:

[(1, 20971727), (7, 2995961), (17, 1233631), (29, 723163), (59, 355453), (103, 203609), (119, 176233), (203, 103309), (413, 50779), (493, 42539), (721, 29087), (1003, 20909), (1711, 12257), (1751, 11977), (2987, 7021), (3451, 6077)]