19971520

素因数分解:

$2^6\times 5^1\times {\mathrm{139}}^1\times {\mathrm{449}}^1$

素因数の和:605

約数の個数: 56

約数和(自身を含む): 48006000

約数和(自身を除く): 28034480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 139, 160, 278, 320, 449, 556, 695, 898, 1112, 1390, 1796, 2224, 2245, 2780, 3592, 4448, 4490, 5560, 7184, 8896, 8980, 11120, 14368, 17960, 22240, 28736, 35920, 44480, 62411, 71840, 124822, 143680, 249644, 312055, 499288, 624110, 998576, 1248220, 1997152, 2496440, 3994304, 4992880, 9985760, 19971520]

約数ペア:

[(1, 19971520), (2, 9985760), (4, 4992880), (5, 3994304), (8, 2496440), (10, 1997152), (16, 1248220), (20, 998576), (32, 624110), (40, 499288), (64, 312055), (80, 249644), (139, 143680), (160, 124822), (278, 71840), (320, 62411), (449, 44480), (556, 35920), (695, 28736), (898, 22240), (1112, 17960), (1390, 14368), (1796, 11120), (2224, 8980), (2245, 8896), (2780, 7184), (3592, 5560), (4448, 4490)]