21194520

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{239}}^1\times {\mathrm{739}}^1$

素因数の和:992

約数の個数: 64

約数和(自身を含む): 63936000

約数和(自身を除く): 42741480

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 239, 478, 717, 739, 956, 1195, 1434, 1478, 1912, 2217, 2390, 2868, 2956, 3585, 3695, 4434, 4780, 5736, 5912, 7170, 7390, 8868, 9560, 11085, 14340, 14780, 17736, 22170, 28680, 29560, 44340, 88680, 176621, 353242, 529863, 706484, 883105, 1059726, 1412968, 1766210, 2119452, 2649315, 3532420, 4238904, 5298630, 7064840, 10597260, 21194520]

約数ペア:

[(1, 21194520), (2, 10597260), (3, 7064840), (4, 5298630), (5, 4238904), (6, 3532420), (8, 2649315), (10, 2119452), (12, 1766210), (15, 1412968), (20, 1059726), (24, 883105), (30, 706484), (40, 529863), (60, 353242), (120, 176621), (239, 88680), (478, 44340), (717, 29560), (739, 28680), (956, 22170), (1195, 17736), (1434, 14780), (1478, 14340), (1912, 11085), (2217, 9560), (2390, 8868), (2868, 7390), (2956, 7170), (3585, 5912), (3695, 5736), (4434, 4780)]