20490820

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{29}}^1\times {\mathrm{103}}^1$

素因数の和:162

約数の個数: 96

約数和(自身を含む): 52416000

約数和(自身を除く): 31925180

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 49, 58, 70, 98, 103, 116, 140, 145, 196, 203, 206, 245, 290, 343, 406, 412, 490, 515, 580, 686, 721, 812, 980, 1015, 1030, 1372, 1421, 1442, 1715, 2030, 2060, 2842, 2884, 2987, 3430, 3605, 4060, 5047, 5684, 5974, 6860, 7105, 7210, 9947, 10094, 11948, 14210, 14420, 14935, 19894, 20188, 20909, 25235, 28420, 29870, 35329, 39788, 41818, 49735, 50470, 59740, 70658, 83636, 99470, 100940, 104545, 141316, 146363, 176645, 198940, 209090, 292726, 353290, 418180, 585452, 706580, 731815, 1024541, 1463630, 2049082, 2927260, 4098164, 5122705, 10245410, 20490820]

約数ペア:

[(1, 20490820), (2, 10245410), (4, 5122705), (5, 4098164), (7, 2927260), (10, 2049082), (14, 1463630), (20, 1024541), (28, 731815), (29, 706580), (35, 585452), (49, 418180), (58, 353290), (70, 292726), (98, 209090), (103, 198940), (116, 176645), (140, 146363), (145, 141316), (196, 104545), (203, 100940), (206, 99470), (245, 83636), (290, 70658), (343, 59740), (406, 50470), (412, 49735), (490, 41818), (515, 39788), (580, 35329), (686, 29870), (721, 28420), (812, 25235), (980, 20909), (1015, 20188), (1030, 19894), (1372, 14935), (1421, 14420), (1442, 14210), (1715, 11948), (2030, 10094), (2060, 9947), (2842, 7210), (2884, 7105), (2987, 6860), (3430, 5974), (3605, 5684), (4060, 5047)]