20997669

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{5347}}^1$

素因数の和:5385

約数の個数: 32

約数和(自身を含む): 36965376

約数和(自身を除く): 15967707

約数列:

[1, 3, 7, 11, 17, 21, 33, 51, 77, 119, 187, 231, 357, 561, 1309, 3927, 5347, 16041, 37429, 58817, 90899, 112287, 176451, 272697, 411719, 636293, 999889, 1235157, 1908879, 2999667, 6999223, 20997669]

約数ペア:

[(1, 20997669), (3, 6999223), (7, 2999667), (11, 1908879), (17, 1235157), (21, 999889), (33, 636293), (51, 411719), (77, 272697), (119, 176451), (187, 112287), (231, 90899), (357, 58817), (561, 37429), (1309, 16041), (3927, 5347)]