21395280

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{239}}^1\times {\mathrm{373}}^1$

素因数の和:628

約数の個数: 80

約数和(自身を含む): 66781440

約数和(自身を除く): 45386160

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 239, 240, 373, 478, 717, 746, 956, 1119, 1195, 1434, 1492, 1865, 1912, 2238, 2390, 2868, 2984, 3585, 3730, 3824, 4476, 4780, 5595, 5736, 5968, 7170, 7460, 8952, 9560, 11190, 11472, 14340, 14920, 17904, 19120, 22380, 28680, 29840, 44760, 57360, 89147, 89520, 178294, 267441, 356588, 445735, 534882, 713176, 891470, 1069764, 1337205, 1426352, 1782940, 2139528, 2674410, 3565880, 4279056, 5348820, 7131760, 10697640, 21395280]

約数ペア:

[(1, 21395280), (2, 10697640), (3, 7131760), (4, 5348820), (5, 4279056), (6, 3565880), (8, 2674410), (10, 2139528), (12, 1782940), (15, 1426352), (16, 1337205), (20, 1069764), (24, 891470), (30, 713176), (40, 534882), (48, 445735), (60, 356588), (80, 267441), (120, 178294), (239, 89520), (240, 89147), (373, 57360), (478, 44760), (717, 29840), (746, 28680), (956, 22380), (1119, 19120), (1195, 17904), (1434, 14920), (1492, 14340), (1865, 11472), (1912, 11190), (2238, 9560), (2390, 8952), (2868, 7460), (2984, 7170), (3585, 5968), (3730, 5736), (3824, 5595), (4476, 4780)]