16920245720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{20759}}^1$

素因数の和:20889

約数の個数: 128

約数和(自身を含む): 45200332800

約数和(自身を除く): 28280087080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 41, 56, 70, 71, 82, 140, 142, 164, 205, 280, 284, 287, 328, 355, 410, 497, 568, 574, 710, 820, 994, 1148, 1420, 1435, 1640, 1988, 2296, 2485, 2840, 2870, 2911, 3976, 4970, 5740, 5822, 9940, 11480, 11644, 14555, 19880, 20377, 20759, 23288, 29110, 40754, 41518, 58220, 81508, 83036, 101885, 103795, 116440, 145313, 163016, 166072, 203770, 207590, 290626, 407540, 415180, 581252, 726565, 815080, 830360, 851119, 1162504, 1453130, 1473889, 1702238, 2906260, 2947778, 3404476, 4255595, 5812520, 5895556, 5957833, 6808952, 7369445, 8511190, 10317223, 11791112, 11915666, 14738890, 17022380, 20634446, 23831332, 29477780, 29789165, 34044760, 41268892, 47662664, 51586115, 58955560, 59578330, 60429449, 82537784, 103172230, 119156660, 120858898, 206344460, 238313320, 241717796, 302147245, 412688920, 423006143, 483435592, 604294490, 846012286, 1208588980, 1692024572, 2115030715, 2417177960, 3384049144, 4230061430, 8460122860, 16920245720]

約数ペア:

[(1, 16920245720), (2, 8460122860), (4, 4230061430), (5, 3384049144), (7, 2417177960), (8, 2115030715), (10, 1692024572), (14, 1208588980), (20, 846012286), (28, 604294490), (35, 483435592), (40, 423006143), (41, 412688920), (56, 302147245), (70, 241717796), (71, 238313320), (82, 206344460), (140, 120858898), (142, 119156660), (164, 103172230), (205, 82537784), (280, 60429449), (284, 59578330), (287, 58955560), (328, 51586115), (355, 47662664), (410, 41268892), (497, 34044760), (568, 29789165), (574, 29477780), (710, 23831332), (820, 20634446), (994, 17022380), (1148, 14738890), (1420, 11915666), (1435, 11791112), (1640, 10317223), (1988, 8511190), (2296, 7369445), (2485, 6808952), (2840, 5957833), (2870, 5895556), (2911, 5812520), (3976, 4255595), (4970, 3404476), (5740, 2947778), (5822, 2906260), (9940, 1702238), (11480, 1473889), (11644, 1453130), (14555, 1162504), (19880, 851119), (20377, 830360), (20759, 815080), (23288, 726565), (29110, 581252), (40754, 415180), (41518, 407540), (58220, 290626), (81508, 207590), (83036, 203770), (101885, 166072), (103795, 163016), (116440, 145313)]