21041820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{29}}^2\times {\mathrm{139}}^1$

素因数の和:212

約数の個数: 108

約数和(自身を含む): 66579240

約数和(自身を除く): 45537420

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 29, 30, 36, 45, 58, 60, 87, 90, 116, 139, 145, 174, 180, 261, 278, 290, 348, 417, 435, 522, 556, 580, 695, 834, 841, 870, 1044, 1251, 1305, 1390, 1668, 1682, 1740, 2085, 2502, 2523, 2610, 2780, 3364, 4031, 4170, 4205, 5004, 5046, 5220, 6255, 7569, 8062, 8340, 8410, 10092, 12093, 12510, 12615, 15138, 16124, 16820, 20155, 24186, 25020, 25230, 30276, 36279, 37845, 40310, 48372, 50460, 60465, 72558, 75690, 80620, 116899, 120930, 145116, 151380, 181395, 233798, 241860, 350697, 362790, 467596, 584495, 701394, 725580, 1052091, 1168990, 1402788, 1753485, 2104182, 2337980, 3506970, 4208364, 5260455, 7013940, 10520910, 21041820]

約数ペア:

[(1, 21041820), (2, 10520910), (3, 7013940), (4, 5260455), (5, 4208364), (6, 3506970), (9, 2337980), (10, 2104182), (12, 1753485), (15, 1402788), (18, 1168990), (20, 1052091), (29, 725580), (30, 701394), (36, 584495), (45, 467596), (58, 362790), (60, 350697), (87, 241860), (90, 233798), (116, 181395), (139, 151380), (145, 145116), (174, 120930), (180, 116899), (261, 80620), (278, 75690), (290, 72558), (348, 60465), (417, 50460), (435, 48372), (522, 40310), (556, 37845), (580, 36279), (695, 30276), (834, 25230), (841, 25020), (870, 24186), (1044, 20155), (1251, 16820), (1305, 16124), (1390, 15138), (1668, 12615), (1682, 12510), (1740, 12093), (2085, 10092), (2502, 8410), (2523, 8340), (2610, 8062), (2780, 7569), (3364, 6255), (4031, 5220), (4170, 5046), (4205, 5004)]