21328671

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{11161}}^1$

素因数の和:11191

約数の個数: 24

約数和(自身を含む): 35629104

約数和(自身を除く): 14300433

約数列:

[1, 3, 7, 13, 21, 39, 49, 91, 147, 273, 637, 1911, 11161, 33483, 78127, 145093, 234381, 435279, 546889, 1015651, 1640667, 3046953, 7109557, 21328671]

約数ペア:

[(1, 21328671), (3, 7109557), (7, 3046953), (13, 1640667), (21, 1015651), (39, 546889), (49, 435279), (91, 234381), (147, 145093), (273, 78127), (637, 33483), (1911, 11161)]