21680470

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{103}}^1$

素因数の和:245

約数の個数: 64

約数和(自身を含む): 46964736

約数和(自身を除く): 25284266

約数列:

[1, 2, 5, 7, 10, 14, 31, 35, 62, 70, 97, 103, 155, 194, 206, 217, 310, 434, 485, 515, 679, 721, 970, 1030, 1085, 1358, 1442, 2170, 3007, 3193, 3395, 3605, 6014, 6386, 6790, 7210, 9991, 15035, 15965, 19982, 21049, 22351, 30070, 31930, 42098, 44702, 49955, 69937, 99910, 105245, 111755, 139874, 210490, 223510, 309721, 349685, 619442, 699370, 1548605, 2168047, 3097210, 4336094, 10840235, 21680470]

約数ペア:

[(1, 21680470), (2, 10840235), (5, 4336094), (7, 3097210), (10, 2168047), (14, 1548605), (31, 699370), (35, 619442), (62, 349685), (70, 309721), (97, 223510), (103, 210490), (155, 139874), (194, 111755), (206, 105245), (217, 99910), (310, 69937), (434, 49955), (485, 44702), (515, 42098), (679, 31930), (721, 30070), (970, 22351), (1030, 21049), (1085, 19982), (1358, 15965), (1442, 15035), (2170, 9991), (3007, 7210), (3193, 6790), (3395, 6386), (3605, 6014)]