20320965

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{2081}}^1$

素因数の和:2130

約数の個数: 48

約数和(自身を含む): 41573376

約数和(自身を除く): 21252411

約数列:

[1, 3, 5, 7, 9, 15, 21, 31, 35, 45, 63, 93, 105, 155, 217, 279, 315, 465, 651, 1085, 1395, 1953, 2081, 3255, 6243, 9765, 10405, 14567, 18729, 31215, 43701, 64511, 72835, 93645, 131103, 193533, 218505, 322555, 451577, 580599, 655515, 967665, 1354731, 2257885, 2902995, 4064193, 6773655, 20320965]

約数ペア:

[(1, 20320965), (3, 6773655), (5, 4064193), (7, 2902995), (9, 2257885), (15, 1354731), (21, 967665), (31, 655515), (35, 580599), (45, 451577), (63, 322555), (93, 218505), (105, 193533), (155, 131103), (217, 93645), (279, 72835), (315, 64511), (465, 43701), (651, 31215), (1085, 18729), (1395, 14567), (1953, 10405), (2081, 9765), (3255, 6243)]