20931183

素因数分解:

$3^3\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1217}}^1$

素因数の和:1253

約数の個数: 48

約数和(自身を含む): 38878560

約数和(自身を除く): 17947377

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 49, 63, 91, 117, 147, 189, 273, 351, 441, 637, 819, 1217, 1323, 1911, 2457, 3651, 5733, 8519, 10953, 15821, 17199, 25557, 32859, 47463, 59633, 76671, 110747, 142389, 178899, 230013, 332241, 427167, 536697, 775229, 996723, 1610091, 2325687, 2990169, 6977061, 20931183]

約数ペア:

[(1, 20931183), (3, 6977061), (7, 2990169), (9, 2325687), (13, 1610091), (21, 996723), (27, 775229), (39, 536697), (49, 427167), (63, 332241), (91, 230013), (117, 178899), (147, 142389), (189, 110747), (273, 76671), (351, 59633), (441, 47463), (637, 32859), (819, 25557), (1217, 17199), (1323, 15821), (1911, 10953), (2457, 8519), (3651, 5733)]