20975920

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{5351}}^1$

素因数の和:5378

約数の個数: 60

約数和(自身を含む): 56741904

約数和(自身を除く): 35765984

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 5351, 10702, 21404, 26755, 37457, 42808, 53510, 74914, 85616, 107020, 149828, 187285, 214040, 262199, 299656, 374570, 428080, 524398, 599312, 749140, 1048796, 1310995, 1498280, 2097592, 2621990, 2996560, 4195184, 5243980, 10487960, 20975920]

約数ペア:

[(1, 20975920), (2, 10487960), (4, 5243980), (5, 4195184), (7, 2996560), (8, 2621990), (10, 2097592), (14, 1498280), (16, 1310995), (20, 1048796), (28, 749140), (35, 599312), (40, 524398), (49, 428080), (56, 374570), (70, 299656), (80, 262199), (98, 214040), (112, 187285), (140, 149828), (196, 107020), (245, 85616), (280, 74914), (392, 53510), (490, 42808), (560, 37457), (784, 26755), (980, 21404), (1960, 10702), (3920, 5351)]