21245427

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{239}}^1$

素因数の和:352

約数の個数: 48

約数和(自身を含む): 37739520

約数和(自身を除く): 16494093

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 83, 119, 153, 239, 249, 357, 581, 717, 747, 1071, 1411, 1673, 1743, 2151, 4063, 4233, 5019, 5229, 9877, 12189, 12699, 15057, 19837, 28441, 29631, 36567, 59511, 85323, 88893, 138859, 178533, 255969, 337229, 416577, 1011687, 1249731, 2360603, 3035061, 7081809, 21245427]

約数ペア:

[(1, 21245427), (3, 7081809), (7, 3035061), (9, 2360603), (17, 1249731), (21, 1011687), (51, 416577), (63, 337229), (83, 255969), (119, 178533), (153, 138859), (239, 88893), (249, 85323), (357, 59511), (581, 36567), (717, 29631), (747, 28441), (1071, 19837), (1411, 15057), (1673, 12699), (1743, 12189), (2151, 9877), (4063, 5229), (4233, 5019)]