20518740

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{241}}^1$

素因数の和:310

約数の個数: 144

約数和(自身を含む): 69765696

約数和(自身を除く): 49246956

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 43, 44, 45, 55, 60, 66, 86, 90, 99, 110, 129, 132, 165, 172, 180, 198, 215, 220, 241, 258, 330, 387, 396, 430, 473, 482, 495, 516, 645, 660, 723, 774, 860, 946, 964, 990, 1205, 1290, 1419, 1446, 1548, 1892, 1935, 1980, 2169, 2365, 2410, 2580, 2651, 2838, 2892, 3615, 3870, 4257, 4338, 4730, 4820, 5302, 5676, 7095, 7230, 7740, 7953, 8514, 8676, 9460, 10363, 10604, 10845, 13255, 14190, 14460, 15906, 17028, 20726, 21285, 21690, 23859, 26510, 28380, 31089, 31812, 39765, 41452, 42570, 43380, 47718, 51815, 53020, 62178, 79530, 85140, 93267, 95436, 103630, 113993, 119295, 124356, 155445, 159060, 186534, 207260, 227986, 238590, 310890, 341979, 373068, 455972, 466335, 477180, 569965, 621780, 683958, 932670, 1025937, 1139930, 1367916, 1709895, 1865340, 2051874, 2279860, 3419790, 4103748, 5129685, 6839580, 10259370, 20518740]

約数ペア:

[(1, 20518740), (2, 10259370), (3, 6839580), (4, 5129685), (5, 4103748), (6, 3419790), (9, 2279860), (10, 2051874), (11, 1865340), (12, 1709895), (15, 1367916), (18, 1139930), (20, 1025937), (22, 932670), (30, 683958), (33, 621780), (36, 569965), (43, 477180), (44, 466335), (45, 455972), (55, 373068), (60, 341979), (66, 310890), (86, 238590), (90, 227986), (99, 207260), (110, 186534), (129, 159060), (132, 155445), (165, 124356), (172, 119295), (180, 113993), (198, 103630), (215, 95436), (220, 93267), (241, 85140), (258, 79530), (330, 62178), (387, 53020), (396, 51815), (430, 47718), (473, 43380), (482, 42570), (495, 41452), (516, 39765), (645, 31812), (660, 31089), (723, 28380), (774, 26510), (860, 23859), (946, 21690), (964, 21285), (990, 20726), (1205, 17028), (1290, 15906), (1419, 14460), (1446, 14190), (1548, 13255), (1892, 10845), (1935, 10604), (1980, 10363), (2169, 9460), (2365, 8676), (2410, 8514), (2580, 7953), (2651, 7740), (2838, 7230), (2892, 7095), (3615, 5676), (3870, 5302), (4257, 4820), (4338, 4730)]