21787400

素因数分解:

$2^3\times 5^2\times {\mathrm{41}}^1\times {\mathrm{2657}}^1$

素因数の和:2714

約数の個数: 48

約数和(自身を含む): 51910740

約数和(自身を除く): 30123340

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 41, 50, 82, 100, 164, 200, 205, 328, 410, 820, 1025, 1640, 2050, 2657, 4100, 5314, 8200, 10628, 13285, 21256, 26570, 53140, 66425, 106280, 108937, 132850, 217874, 265700, 435748, 531400, 544685, 871496, 1089370, 2178740, 2723425, 4357480, 5446850, 10893700, 21787400]

約数ペア:

[(1, 21787400), (2, 10893700), (4, 5446850), (5, 4357480), (8, 2723425), (10, 2178740), (20, 1089370), (25, 871496), (40, 544685), (41, 531400), (50, 435748), (82, 265700), (100, 217874), (164, 132850), (200, 108937), (205, 106280), (328, 66425), (410, 53140), (820, 26570), (1025, 21256), (1640, 13285), (2050, 10628), (2657, 8200), (4100, 5314)]