20018640

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{239}}^1\times {\mathrm{349}}^1$

素因数の和:604

約数の個数: 80

約数和(自身を含む): 62496000

約数和(自身を除く): 42477360

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 239, 240, 349, 478, 698, 717, 956, 1047, 1195, 1396, 1434, 1745, 1912, 2094, 2390, 2792, 2868, 3490, 3585, 3824, 4188, 4780, 5235, 5584, 5736, 6980, 7170, 8376, 9560, 10470, 11472, 13960, 14340, 16752, 19120, 20940, 27920, 28680, 41880, 57360, 83411, 83760, 166822, 250233, 333644, 417055, 500466, 667288, 834110, 1000932, 1251165, 1334576, 1668220, 2001864, 2502330, 3336440, 4003728, 5004660, 6672880, 10009320, 20018640]

約数ペア:

[(1, 20018640), (2, 10009320), (3, 6672880), (4, 5004660), (5, 4003728), (6, 3336440), (8, 2502330), (10, 2001864), (12, 1668220), (15, 1334576), (16, 1251165), (20, 1000932), (24, 834110), (30, 667288), (40, 500466), (48, 417055), (60, 333644), (80, 250233), (120, 166822), (239, 83760), (240, 83411), (349, 57360), (478, 41880), (698, 28680), (717, 27920), (956, 20940), (1047, 19120), (1195, 16752), (1396, 14340), (1434, 13960), (1745, 11472), (1912, 10470), (2094, 9560), (2390, 8376), (2792, 7170), (2868, 6980), (3490, 5736), (3585, 5584), (3824, 5235), (4188, 4780)]