20105820

素因数分解:

$2^2\times 3^6\times 5^1\times 7^1\times {\mathrm{197}}^1$

素因数の和:231

約数の個数: 168

約数和(自身を含む): 72715104

約数和(自身を除く): 52609284

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 27, 28, 30, 35, 36, 42, 45, 54, 60, 63, 70, 81, 84, 90, 105, 108, 126, 135, 140, 162, 180, 189, 197, 210, 243, 252, 270, 315, 324, 378, 394, 405, 420, 486, 540, 567, 591, 630, 729, 756, 788, 810, 945, 972, 985, 1134, 1182, 1215, 1260, 1379, 1458, 1620, 1701, 1773, 1890, 1970, 2268, 2364, 2430, 2758, 2835, 2916, 2955, 3402, 3546, 3645, 3780, 3940, 4137, 4860, 5103, 5319, 5516, 5670, 5910, 6804, 6895, 7092, 7290, 8274, 8505, 8865, 10206, 10638, 11340, 11820, 12411, 13790, 14580, 15957, 16548, 17010, 17730, 20412, 20685, 21276, 24822, 25515, 26595, 27580, 31914, 34020, 35460, 37233, 41370, 47871, 49644, 51030, 53190, 62055, 63828, 74466, 79785, 82740, 95742, 102060, 106380, 111699, 124110, 143613, 148932, 159570, 186165, 191484, 223398, 239355, 248220, 287226, 319140, 335097, 372330, 446796, 478710, 558495, 574452, 670194, 718065, 744660, 957420, 1005291, 1116990, 1340388, 1436130, 1675485, 2010582, 2233980, 2872260, 3350970, 4021164, 5026455, 6701940, 10052910, 20105820]

約数ペア:

[(1, 20105820), (2, 10052910), (3, 6701940), (4, 5026455), (5, 4021164), (6, 3350970), (7, 2872260), (9, 2233980), (10, 2010582), (12, 1675485), (14, 1436130), (15, 1340388), (18, 1116990), (20, 1005291), (21, 957420), (27, 744660), (28, 718065), (30, 670194), (35, 574452), (36, 558495), (42, 478710), (45, 446796), (54, 372330), (60, 335097), (63, 319140), (70, 287226), (81, 248220), (84, 239355), (90, 223398), (105, 191484), (108, 186165), (126, 159570), (135, 148932), (140, 143613), (162, 124110), (180, 111699), (189, 106380), (197, 102060), (210, 95742), (243, 82740), (252, 79785), (270, 74466), (315, 63828), (324, 62055), (378, 53190), (394, 51030), (405, 49644), (420, 47871), (486, 41370), (540, 37233), (567, 35460), (591, 34020), (630, 31914), (729, 27580), (756, 26595), (788, 25515), (810, 24822), (945, 21276), (972, 20685), (985, 20412), (1134, 17730), (1182, 17010), (1215, 16548), (1260, 15957), (1379, 14580), (1458, 13790), (1620, 12411), (1701, 11820), (1773, 11340), (1890, 10638), (1970, 10206), (2268, 8865), (2364, 8505), (2430, 8274), (2758, 7290), (2835, 7092), (2916, 6895), (2955, 6804), (3402, 5910), (3546, 5670), (3645, 5516), (3780, 5319), (3940, 5103), (4137, 4860)]