21157818

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^2\times {\mathrm{151}}^1\times {\mathrm{193}}^1$

素因数の和:371

約数の個数: 48

約数和(自身を含む): 47062848

約数和(自身を除く): 25905030

約数列:

[1, 2, 3, 6, 11, 22, 33, 66, 121, 151, 193, 242, 302, 363, 386, 453, 579, 726, 906, 1158, 1661, 2123, 3322, 4246, 4983, 6369, 9966, 12738, 18271, 23353, 29143, 36542, 46706, 54813, 58286, 70059, 87429, 109626, 140118, 174858, 320573, 641146, 961719, 1923438, 3526303, 7052606, 10578909, 21157818]

約数ペア:

[(1, 21157818), (2, 10578909), (3, 7052606), (6, 3526303), (11, 1923438), (22, 961719), (33, 641146), (66, 320573), (121, 174858), (151, 140118), (193, 109626), (242, 87429), (302, 70059), (363, 58286), (386, 54813), (453, 46706), (579, 36542), (726, 29143), (906, 23353), (1158, 18271), (1661, 12738), (2123, 9966), (3322, 6369), (4246, 4983)]