20931520

素因数分解:

$2^6\times 5^1\times {\mathrm{149}}^1\times {\mathrm{439}}^1$

素因数の和:605

約数の個数: 56

約数和(自身を含む): 50292000

約数和(自身を除く): 29360480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 149, 160, 298, 320, 439, 596, 745, 878, 1192, 1490, 1756, 2195, 2384, 2980, 3512, 4390, 4768, 5960, 7024, 8780, 9536, 11920, 14048, 17560, 23840, 28096, 35120, 47680, 65411, 70240, 130822, 140480, 261644, 327055, 523288, 654110, 1046576, 1308220, 2093152, 2616440, 4186304, 5232880, 10465760, 20931520]

約数ペア:

[(1, 20931520), (2, 10465760), (4, 5232880), (5, 4186304), (8, 2616440), (10, 2093152), (16, 1308220), (20, 1046576), (32, 654110), (40, 523288), (64, 327055), (80, 261644), (149, 140480), (160, 130822), (298, 70240), (320, 65411), (439, 47680), (596, 35120), (745, 28096), (878, 23840), (1192, 17560), (1490, 14048), (1756, 11920), (2195, 9536), (2384, 8780), (2980, 7024), (3512, 5960), (4390, 4768)]