21490126

素因数分解:

$2^1\times 7^2\times {\mathrm{103}}^1\times {\mathrm{2129}}^1$

素因数の和:2248

約数の個数: 24

約数和(自身を含む): 37879920

約数和(自身を除く): 16389794

約数列:

[1, 2, 7, 14, 49, 98, 103, 206, 721, 1442, 2129, 4258, 5047, 10094, 14903, 29806, 104321, 208642, 219287, 438574, 1535009, 3070018, 10745063, 21490126]

約数ペア:

[(1, 21490126), (2, 10745063), (7, 3070018), (14, 1535009), (49, 438574), (98, 219287), (103, 208642), (206, 104321), (721, 29806), (1442, 14903), (2129, 10094), (4258, 5047)]