21665504

素因数分解:

$2^5\times 7^1\times {\mathrm{311}}^2$

素因数の和:639

約数の個数: 36

約数和(自身を含む): 48904632

約数和(自身を除く): 27239128

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 112, 224, 311, 622, 1244, 2177, 2488, 4354, 4976, 8708, 9952, 17416, 34832, 69664, 96721, 193442, 386884, 677047, 773768, 1354094, 1547536, 2708188, 3095072, 5416376, 10832752, 21665504]

約数ペア:

[(1, 21665504), (2, 10832752), (4, 5416376), (7, 3095072), (8, 2708188), (14, 1547536), (16, 1354094), (28, 773768), (32, 677047), (56, 386884), (112, 193442), (224, 96721), (311, 69664), (622, 34832), (1244, 17416), (2177, 9952), (2488, 8708), (4354, 4976)]