19702557

素因数分解:

$3^2\times 7^2\times {\mathrm{43}}^1\times {\mathrm{1039}}^1$

素因数の和:1102

約数の個数: 36

約数和(自身を含む): 33908160

約数和(自身を除く): 14205603

約数列:

[1, 3, 7, 9, 21, 43, 49, 63, 129, 147, 301, 387, 441, 903, 1039, 2107, 2709, 3117, 6321, 7273, 9351, 18963, 21819, 44677, 50911, 65457, 134031, 152733, 312739, 402093, 458199, 938217, 2189173, 2814651, 6567519, 19702557]

約数ペア:

[(1, 19702557), (3, 6567519), (7, 2814651), (9, 2189173), (21, 938217), (43, 458199), (49, 402093), (63, 312739), (129, 152733), (147, 134031), (301, 65457), (387, 50911), (441, 44677), (903, 21819), (1039, 18963), (2107, 9351), (2709, 7273), (3117, 6321)]