21557340

素因数分解:

$2^2\times 3^4\times 5^1\times 7^1\times {\mathrm{1901}}^1$

素因数の和:1929

約数の個数: 120

約数和(自身を含む): 77327712

約数和(自身を除く): 55770372

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, 210, 252, 270, 315, 324, 378, 405, 420, 540, 567, 630, 756, 810, 945, 1134, 1260, 1620, 1890, 1901, 2268, 2835, 3780, 3802, 5670, 5703, 7604, 9505, 11340, 11406, 13307, 17109, 19010, 22812, 26614, 28515, 34218, 38020, 39921, 51327, 53228, 57030, 66535, 68436, 79842, 85545, 102654, 114060, 119763, 133070, 153981, 159684, 171090, 199605, 205308, 239526, 256635, 266140, 307962, 342180, 359289, 399210, 479052, 513270, 598815, 615924, 718578, 769905, 798420, 1026540, 1077867, 1197630, 1437156, 1539810, 1796445, 2155734, 2395260, 3079620, 3592890, 4311468, 5389335, 7185780, 10778670, 21557340]

約数ペア:

[(1, 21557340), (2, 10778670), (3, 7185780), (4, 5389335), (5, 4311468), (6, 3592890), (7, 3079620), (9, 2395260), (10, 2155734), (12, 1796445), (14, 1539810), (15, 1437156), (18, 1197630), (20, 1077867), (21, 1026540), (27, 798420), (28, 769905), (30, 718578), (35, 615924), (36, 598815), (42, 513270), (45, 479052), (54, 399210), (60, 359289), (63, 342180), (70, 307962), (81, 266140), (84, 256635), (90, 239526), (105, 205308), (108, 199605), (126, 171090), (135, 159684), (140, 153981), (162, 133070), (180, 119763), (189, 114060), (210, 102654), (252, 85545), (270, 79842), (315, 68436), (324, 66535), (378, 57030), (405, 53228), (420, 51327), (540, 39921), (567, 38020), (630, 34218), (756, 28515), (810, 26614), (945, 22812), (1134, 19010), (1260, 17109), (1620, 13307), (1890, 11406), (1901, 11340), (2268, 9505), (2835, 7604), (3780, 5703), (3802, 5670)]