20651480

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{937}}^1$

素因数の和:996

約数の個数: 64

約数和(自身を含む): 50652000

約数和(自身を除く): 30000520

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 29, 38, 40, 58, 76, 95, 116, 145, 152, 190, 232, 290, 380, 551, 580, 760, 937, 1102, 1160, 1874, 2204, 2755, 3748, 4408, 4685, 5510, 7496, 9370, 11020, 17803, 18740, 22040, 27173, 35606, 37480, 54346, 71212, 89015, 108692, 135865, 142424, 178030, 217384, 271730, 356060, 516287, 543460, 712120, 1032574, 1086920, 2065148, 2581435, 4130296, 5162870, 10325740, 20651480]

約数ペア:

[(1, 20651480), (2, 10325740), (4, 5162870), (5, 4130296), (8, 2581435), (10, 2065148), (19, 1086920), (20, 1032574), (29, 712120), (38, 543460), (40, 516287), (58, 356060), (76, 271730), (95, 217384), (116, 178030), (145, 142424), (152, 135865), (190, 108692), (232, 89015), (290, 71212), (380, 54346), (551, 37480), (580, 35606), (760, 27173), (937, 22040), (1102, 18740), (1160, 17803), (1874, 11020), (2204, 9370), (2755, 7496), (3748, 5510), (4408, 4685)]