19987380

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{547}}^1$

素因数の和:598

約数の個数: 144

約数和(自身を含む): 71809920

約数和(自身を除く): 51822540

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 29, 30, 35, 36, 42, 45, 58, 60, 63, 70, 84, 87, 90, 105, 116, 126, 140, 145, 174, 180, 203, 210, 252, 261, 290, 315, 348, 406, 420, 435, 522, 547, 580, 609, 630, 812, 870, 1015, 1044, 1094, 1218, 1260, 1305, 1641, 1740, 1827, 2030, 2188, 2436, 2610, 2735, 3045, 3282, 3654, 3829, 4060, 4923, 5220, 5470, 6090, 6564, 7308, 7658, 8205, 9135, 9846, 10940, 11487, 12180, 15316, 15863, 16410, 18270, 19145, 19692, 22974, 24615, 31726, 32820, 34461, 36540, 38290, 45948, 47589, 49230, 57435, 63452, 68922, 76580, 79315, 95178, 98460, 111041, 114870, 137844, 142767, 158630, 172305, 190356, 222082, 229740, 237945, 285534, 317260, 333123, 344610, 444164, 475890, 555205, 571068, 666246, 689220, 713835, 951780, 999369, 1110410, 1332492, 1427670, 1665615, 1998738, 2220820, 2855340, 3331230, 3997476, 4996845, 6662460, 9993690, 19987380]

約数ペア:

[(1, 19987380), (2, 9993690), (3, 6662460), (4, 4996845), (5, 3997476), (6, 3331230), (7, 2855340), (9, 2220820), (10, 1998738), (12, 1665615), (14, 1427670), (15, 1332492), (18, 1110410), (20, 999369), (21, 951780), (28, 713835), (29, 689220), (30, 666246), (35, 571068), (36, 555205), (42, 475890), (45, 444164), (58, 344610), (60, 333123), (63, 317260), (70, 285534), (84, 237945), (87, 229740), (90, 222082), (105, 190356), (116, 172305), (126, 158630), (140, 142767), (145, 137844), (174, 114870), (180, 111041), (203, 98460), (210, 95178), (252, 79315), (261, 76580), (290, 68922), (315, 63452), (348, 57435), (406, 49230), (420, 47589), (435, 45948), (522, 38290), (547, 36540), (580, 34461), (609, 32820), (630, 31726), (812, 24615), (870, 22974), (1015, 19692), (1044, 19145), (1094, 18270), (1218, 16410), (1260, 15863), (1305, 15316), (1641, 12180), (1740, 11487), (1827, 10940), (2030, 9846), (2188, 9135), (2436, 8205), (2610, 7658), (2735, 7308), (3045, 6564), (3282, 6090), (3654, 5470), (3829, 5220), (4060, 4923)]