20728972

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{193}}^1\times {\mathrm{2441}}^1$

素因数の和:2649

約数の個数: 24

約数和(自身を含む): 39794832

約数和(自身を除く): 19065860

約数列:

[1, 2, 4, 11, 22, 44, 193, 386, 772, 2123, 2441, 4246, 4882, 8492, 9764, 26851, 53702, 107404, 471113, 942226, 1884452, 5182243, 10364486, 20728972]

約数ペア:

[(1, 20728972), (2, 10364486), (4, 5182243), (11, 1884452), (22, 942226), (44, 471113), (193, 107404), (386, 53702), (772, 26851), (2123, 9764), (2441, 8492), (4246, 4882)]