20839980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{29}}^2\times {\mathrm{59}}^1$

素因数の和:136

約数の個数: 144

約数和(自身を含む): 70237440

約数和(自身を除く): 49397460

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 29, 30, 35, 42, 58, 59, 60, 70, 84, 87, 105, 116, 118, 140, 145, 174, 177, 203, 210, 236, 290, 295, 348, 354, 406, 413, 420, 435, 580, 590, 609, 708, 812, 826, 841, 870, 885, 1015, 1180, 1218, 1239, 1652, 1682, 1711, 1740, 1770, 2030, 2065, 2436, 2478, 2523, 3045, 3364, 3422, 3540, 4060, 4130, 4205, 4956, 5046, 5133, 5887, 6090, 6195, 6844, 8260, 8410, 8555, 10092, 10266, 11774, 11977, 12180, 12390, 12615, 16820, 17110, 17661, 20532, 23548, 23954, 24780, 25230, 25665, 29435, 34220, 35322, 35931, 47908, 49619, 50460, 51330, 58870, 59885, 70644, 71862, 88305, 99238, 102660, 117740, 119770, 143724, 148857, 176610, 179655, 198476, 239540, 248095, 297714, 347333, 353220, 359310, 496190, 595428, 694666, 718620, 744285, 992380, 1041999, 1389332, 1488570, 1736665, 2083998, 2977140, 3473330, 4167996, 5209995, 6946660, 10419990, 20839980]

約数ペア:

[(1, 20839980), (2, 10419990), (3, 6946660), (4, 5209995), (5, 4167996), (6, 3473330), (7, 2977140), (10, 2083998), (12, 1736665), (14, 1488570), (15, 1389332), (20, 1041999), (21, 992380), (28, 744285), (29, 718620), (30, 694666), (35, 595428), (42, 496190), (58, 359310), (59, 353220), (60, 347333), (70, 297714), (84, 248095), (87, 239540), (105, 198476), (116, 179655), (118, 176610), (140, 148857), (145, 143724), (174, 119770), (177, 117740), (203, 102660), (210, 99238), (236, 88305), (290, 71862), (295, 70644), (348, 59885), (354, 58870), (406, 51330), (413, 50460), (420, 49619), (435, 47908), (580, 35931), (590, 35322), (609, 34220), (708, 29435), (812, 25665), (826, 25230), (841, 24780), (870, 23954), (885, 23548), (1015, 20532), (1180, 17661), (1218, 17110), (1239, 16820), (1652, 12615), (1682, 12390), (1711, 12180), (1740, 11977), (1770, 11774), (2030, 10266), (2065, 10092), (2436, 8555), (2478, 8410), (2523, 8260), (3045, 6844), (3364, 6195), (3422, 6090), (3540, 5887), (4060, 5133), (4130, 5046), (4205, 4956)]