21202440

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{587}}^1$

素因数の和:651

約数の個数: 128

約数和(自身を含む): 74511360

約数和(自身を除く): 53308920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 43, 56, 60, 70, 84, 86, 105, 120, 129, 140, 168, 172, 210, 215, 258, 280, 301, 344, 420, 430, 516, 587, 602, 645, 840, 860, 903, 1032, 1174, 1204, 1290, 1505, 1720, 1761, 1806, 2348, 2408, 2580, 2935, 3010, 3522, 3612, 4109, 4515, 4696, 5160, 5870, 6020, 7044, 7224, 8218, 8805, 9030, 11740, 12040, 12327, 14088, 16436, 17610, 18060, 20545, 23480, 24654, 25241, 32872, 35220, 36120, 41090, 49308, 50482, 61635, 70440, 75723, 82180, 98616, 100964, 123270, 126205, 151446, 164360, 176687, 201928, 246540, 252410, 302892, 353374, 378615, 493080, 504820, 530061, 605784, 706748, 757230, 883435, 1009640, 1060122, 1413496, 1514460, 1766870, 2120244, 2650305, 3028920, 3533740, 4240488, 5300610, 7067480, 10601220, 21202440]

約数ペア:

[(1, 21202440), (2, 10601220), (3, 7067480), (4, 5300610), (5, 4240488), (6, 3533740), (7, 3028920), (8, 2650305), (10, 2120244), (12, 1766870), (14, 1514460), (15, 1413496), (20, 1060122), (21, 1009640), (24, 883435), (28, 757230), (30, 706748), (35, 605784), (40, 530061), (42, 504820), (43, 493080), (56, 378615), (60, 353374), (70, 302892), (84, 252410), (86, 246540), (105, 201928), (120, 176687), (129, 164360), (140, 151446), (168, 126205), (172, 123270), (210, 100964), (215, 98616), (258, 82180), (280, 75723), (301, 70440), (344, 61635), (420, 50482), (430, 49308), (516, 41090), (587, 36120), (602, 35220), (645, 32872), (840, 25241), (860, 24654), (903, 23480), (1032, 20545), (1174, 18060), (1204, 17610), (1290, 16436), (1505, 14088), (1720, 12327), (1761, 12040), (1806, 11740), (2348, 9030), (2408, 8805), (2580, 8218), (2935, 7224), (3010, 7044), (3522, 6020), (3612, 5870), (4109, 5160), (4515, 4696)]