21538680

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{239}}^1\times {\mathrm{751}}^1$

素因数の和:1004

約数の個数: 64

約数和(自身を含む): 64972800

約数和(自身を除く): 43434120

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 239, 478, 717, 751, 956, 1195, 1434, 1502, 1912, 2253, 2390, 2868, 3004, 3585, 3755, 4506, 4780, 5736, 6008, 7170, 7510, 9012, 9560, 11265, 14340, 15020, 18024, 22530, 28680, 30040, 45060, 90120, 179489, 358978, 538467, 717956, 897445, 1076934, 1435912, 1794890, 2153868, 2692335, 3589780, 4307736, 5384670, 7179560, 10769340, 21538680]

約数ペア:

[(1, 21538680), (2, 10769340), (3, 7179560), (4, 5384670), (5, 4307736), (6, 3589780), (8, 2692335), (10, 2153868), (12, 1794890), (15, 1435912), (20, 1076934), (24, 897445), (30, 717956), (40, 538467), (60, 358978), (120, 179489), (239, 90120), (478, 45060), (717, 30040), (751, 28680), (956, 22530), (1195, 18024), (1434, 15020), (1502, 14340), (1912, 11265), (2253, 9560), (2390, 9012), (2868, 7510), (3004, 7170), (3585, 6008), (3755, 5736), (4506, 4780)]