20127915

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{317}}^1$

素因数の和:428

約数の個数: 48

約数和(自身を含む): 37503648

約数和(自身を除く): 17375733

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 83, 85, 153, 249, 255, 317, 415, 747, 765, 951, 1245, 1411, 1585, 2853, 3735, 4233, 4755, 5389, 7055, 12699, 14265, 16167, 21165, 26311, 26945, 48501, 63495, 78933, 80835, 131555, 236799, 242505, 394665, 447287, 1183995, 1341861, 2236435, 4025583, 6709305, 20127915]

約数ペア:

[(1, 20127915), (3, 6709305), (5, 4025583), (9, 2236435), (15, 1341861), (17, 1183995), (45, 447287), (51, 394665), (83, 242505), (85, 236799), (153, 131555), (249, 80835), (255, 78933), (317, 63495), (415, 48501), (747, 26945), (765, 26311), (951, 21165), (1245, 16167), (1411, 14265), (1585, 12699), (2853, 7055), (3735, 5389), (4233, 4755)]