20457180

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{3919}}^1$

素因数の和:3963

約数の個数: 72

約数和(自身を含む): 64209600

約数和(自身を除く): 43752420

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 29, 30, 36, 45, 58, 60, 87, 90, 116, 145, 174, 180, 261, 290, 348, 435, 522, 580, 870, 1044, 1305, 1740, 2610, 3919, 5220, 7838, 11757, 15676, 19595, 23514, 35271, 39190, 47028, 58785, 70542, 78380, 113651, 117570, 141084, 176355, 227302, 235140, 340953, 352710, 454604, 568255, 681906, 705420, 1022859, 1136510, 1363812, 1704765, 2045718, 2273020, 3409530, 4091436, 5114295, 6819060, 10228590, 20457180]

約数ペア:

[(1, 20457180), (2, 10228590), (3, 6819060), (4, 5114295), (5, 4091436), (6, 3409530), (9, 2273020), (10, 2045718), (12, 1704765), (15, 1363812), (18, 1136510), (20, 1022859), (29, 705420), (30, 681906), (36, 568255), (45, 454604), (58, 352710), (60, 340953), (87, 235140), (90, 227302), (116, 176355), (145, 141084), (174, 117570), (180, 113651), (261, 78380), (290, 70542), (348, 58785), (435, 47028), (522, 39190), (580, 35271), (870, 23514), (1044, 19595), (1305, 15676), (1740, 11757), (2610, 7838), (3919, 5220)]