20181680

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{8699}}^1$

素因数の和:8741

約数の個数: 40

約数和(自身を含む): 48546000

約数和(自身を除く): 28364320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 116, 145, 232, 290, 464, 580, 1160, 2320, 8699, 17398, 34796, 43495, 69592, 86990, 139184, 173980, 252271, 347960, 504542, 695920, 1009084, 1261355, 2018168, 2522710, 4036336, 5045420, 10090840, 20181680]

約数ペア:

[(1, 20181680), (2, 10090840), (4, 5045420), (5, 4036336), (8, 2522710), (10, 2018168), (16, 1261355), (20, 1009084), (29, 695920), (40, 504542), (58, 347960), (80, 252271), (116, 173980), (145, 139184), (232, 86990), (290, 69592), (464, 43495), (580, 34796), (1160, 17398), (2320, 8699)]