20578140

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{547}}^1$

素因数の和:592

約数の個数: 144

約数和(自身を含む): 71809920

約数和(自身を除く): 51231780

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 19, 20, 22, 30, 33, 36, 38, 44, 45, 55, 57, 60, 66, 76, 90, 95, 99, 110, 114, 132, 165, 171, 180, 190, 198, 209, 220, 228, 285, 330, 342, 380, 396, 418, 495, 547, 570, 627, 660, 684, 836, 855, 990, 1045, 1094, 1140, 1254, 1641, 1710, 1881, 1980, 2090, 2188, 2508, 2735, 3135, 3282, 3420, 3762, 4180, 4923, 5470, 6017, 6270, 6564, 7524, 8205, 9405, 9846, 10393, 10940, 12034, 12540, 16410, 18051, 18810, 19692, 20786, 24068, 24615, 30085, 31179, 32820, 36102, 37620, 41572, 49230, 51965, 54153, 60170, 62358, 72204, 90255, 93537, 98460, 103930, 108306, 114323, 120340, 124716, 155895, 180510, 187074, 207860, 216612, 228646, 270765, 311790, 342969, 361020, 374148, 457292, 467685, 541530, 571615, 623580, 685938, 935370, 1028907, 1083060, 1143230, 1371876, 1714845, 1870740, 2057814, 2286460, 3429690, 4115628, 5144535, 6859380, 10289070, 20578140]

約数ペア:

[(1, 20578140), (2, 10289070), (3, 6859380), (4, 5144535), (5, 4115628), (6, 3429690), (9, 2286460), (10, 2057814), (11, 1870740), (12, 1714845), (15, 1371876), (18, 1143230), (19, 1083060), (20, 1028907), (22, 935370), (30, 685938), (33, 623580), (36, 571615), (38, 541530), (44, 467685), (45, 457292), (55, 374148), (57, 361020), (60, 342969), (66, 311790), (76, 270765), (90, 228646), (95, 216612), (99, 207860), (110, 187074), (114, 180510), (132, 155895), (165, 124716), (171, 120340), (180, 114323), (190, 108306), (198, 103930), (209, 98460), (220, 93537), (228, 90255), (285, 72204), (330, 62358), (342, 60170), (380, 54153), (396, 51965), (418, 49230), (495, 41572), (547, 37620), (570, 36102), (627, 32820), (660, 31179), (684, 30085), (836, 24615), (855, 24068), (990, 20786), (1045, 19692), (1094, 18810), (1140, 18051), (1254, 16410), (1641, 12540), (1710, 12034), (1881, 10940), (1980, 10393), (2090, 9846), (2188, 9405), (2508, 8205), (2735, 7524), (3135, 6564), (3282, 6270), (3420, 6017), (3762, 5470), (4180, 4923)]