20558187

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{83}}^1$

素因数の和:204

約数の個数: 48

約数和(自身を含む): 33939360

約数和(自身を除く): 13381173

約数列:

[1, 3, 9, 13, 29, 39, 73, 83, 87, 117, 219, 249, 261, 377, 657, 747, 949, 1079, 1131, 2117, 2407, 2847, 3237, 3393, 6059, 6351, 7221, 8541, 9711, 18177, 19053, 21663, 27521, 31291, 54531, 78767, 82563, 93873, 175711, 236301, 247689, 281619, 527133, 708903, 1581399, 2284243, 6852729, 20558187]

約数ペア:

[(1, 20558187), (3, 6852729), (9, 2284243), (13, 1581399), (29, 708903), (39, 527133), (73, 281619), (83, 247689), (87, 236301), (117, 175711), (219, 93873), (249, 82563), (261, 78767), (377, 54531), (657, 31291), (747, 27521), (949, 21663), (1079, 19053), (1131, 18177), (2117, 9711), (2407, 8541), (2847, 7221), (3237, 6351), (3393, 6059)]