18815580

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{137}}^1$

素因数の和:268

約数の個数: 144

約数和(自身を含む): 66306240

約数和(自身を除く): 47490660

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 109, 126, 137, 140, 180, 210, 218, 252, 274, 315, 327, 411, 420, 436, 545, 548, 630, 654, 685, 763, 822, 959, 981, 1090, 1233, 1260, 1308, 1370, 1526, 1635, 1644, 1918, 1962, 2055, 2180, 2289, 2466, 2740, 2877, 3052, 3270, 3815, 3836, 3924, 4110, 4578, 4795, 4905, 4932, 5754, 6165, 6540, 6867, 7630, 8220, 8631, 9156, 9590, 9810, 11445, 11508, 12330, 13734, 14385, 14933, 15260, 17262, 19180, 19620, 22890, 24660, 27468, 28770, 29866, 34335, 34524, 43155, 44799, 45780, 57540, 59732, 68670, 74665, 86310, 89598, 104531, 134397, 137340, 149330, 172620, 179196, 209062, 223995, 268794, 298660, 313593, 418124, 447990, 522655, 537588, 627186, 671985, 895980, 940779, 1045310, 1254372, 1343970, 1567965, 1881558, 2090620, 2687940, 3135930, 3763116, 4703895, 6271860, 9407790, 18815580]

約数ペア:

[(1, 18815580), (2, 9407790), (3, 6271860), (4, 4703895), (5, 3763116), (6, 3135930), (7, 2687940), (9, 2090620), (10, 1881558), (12, 1567965), (14, 1343970), (15, 1254372), (18, 1045310), (20, 940779), (21, 895980), (28, 671985), (30, 627186), (35, 537588), (36, 522655), (42, 447990), (45, 418124), (60, 313593), (63, 298660), (70, 268794), (84, 223995), (90, 209062), (105, 179196), (109, 172620), (126, 149330), (137, 137340), (140, 134397), (180, 104531), (210, 89598), (218, 86310), (252, 74665), (274, 68670), (315, 59732), (327, 57540), (411, 45780), (420, 44799), (436, 43155), (545, 34524), (548, 34335), (630, 29866), (654, 28770), (685, 27468), (763, 24660), (822, 22890), (959, 19620), (981, 19180), (1090, 17262), (1233, 15260), (1260, 14933), (1308, 14385), (1370, 13734), (1526, 12330), (1635, 11508), (1644, 11445), (1918, 9810), (1962, 9590), (2055, 9156), (2180, 8631), (2289, 8220), (2466, 7630), (2740, 6867), (2877, 6540), (3052, 6165), (3270, 5754), (3815, 4932), (3836, 4905), (3924, 4795), (4110, 4578)]