20415420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{3911}}^1$

素因数の和:3955

約数の個数: 72

約数和(自身を含む): 64078560

約数和(自身を除く): 43663140

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, 3911, 5220, 7822, 11733, 15644, 19555, 23466, 35199, 39110, 46932, 58665, 70398, 78220, 113419, 117330, 140796, 175995, 226838, 234660, 340257, 351990, 453676, 567095, 680514, 703980, 1020771, 1134190, 1361028, 1701285, 2041542, 2268380, 3402570, 4083084, 5103855, 6805140, 10207710, 20415420]

約数ペア:

[(1, 20415420), (2, 10207710), (3, 6805140), (4, 5103855), (5, 4083084), (6, 3402570), (9, 2268380), (10, 2041542), (12, 1701285), (15, 1361028), (18, 1134190), (20, 1020771), (29, 703980), (30, 680514), (36, 567095), (45, 453676), (58, 351990), (60, 340257), (87, 234660), (90, 226838), (116, 175995), (145, 140796), (174, 117330), (180, 113419), (261, 78220), (290, 70398), (348, 58665), (435, 46932), (522, 39110), (580, 35199), (870, 23466), (1044, 19555), (1305, 15644), (1740, 11733), (2610, 7822), (3911, 5220)]