21721084

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{647}}^1$

素因数の和:778

約数の個数: 48

約数和(自身を含む): 47900160

約数和(自身を除く): 26179076

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 109, 154, 218, 308, 436, 647, 763, 1199, 1294, 1526, 2398, 2588, 3052, 4529, 4796, 7117, 8393, 9058, 14234, 16786, 18116, 28468, 33572, 49819, 70523, 99638, 141046, 199276, 282092, 493661, 775753, 987322, 1551506, 1974644, 3103012, 5430271, 10860542, 21721084]

約数ペア:

[(1, 21721084), (2, 10860542), (4, 5430271), (7, 3103012), (11, 1974644), (14, 1551506), (22, 987322), (28, 775753), (44, 493661), (77, 282092), (109, 199276), (154, 141046), (218, 99638), (308, 70523), (436, 49819), (647, 33572), (763, 28468), (1199, 18116), (1294, 16786), (1526, 14234), (2398, 9058), (2588, 8393), (3052, 7117), (4529, 4796)]