20542221

素因数分解:

$3^3\times 7^2\times {\mathrm{15527}}^1$

素因数の和:15550

約数の個数: 24

約数和(自身を含む): 35403840

約数和(自身を除く): 14861619

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 147, 189, 441, 1323, 15527, 46581, 108689, 139743, 326067, 419229, 760823, 978201, 2282469, 2934603, 6847407, 20542221]

約数ペア:

[(1, 20542221), (3, 6847407), (7, 2934603), (9, 2282469), (21, 978201), (27, 760823), (49, 419229), (63, 326067), (147, 139743), (189, 108689), (441, 46581), (1323, 15527)]