21027258

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{3881}}^1$

素因数の和:3939

約数の個数: 48

約数和(自身を含む): 53292096

約数和(自身を除く): 32264838

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 43, 63, 86, 126, 129, 258, 301, 387, 602, 774, 903, 1806, 2709, 3881, 5418, 7762, 11643, 23286, 27167, 34929, 54334, 69858, 81501, 163002, 166883, 244503, 333766, 489006, 500649, 1001298, 1168181, 1501947, 2336362, 3003894, 3504543, 7009086, 10513629, 21027258]

約数ペア:

[(1, 21027258), (2, 10513629), (3, 7009086), (6, 3504543), (7, 3003894), (9, 2336362), (14, 1501947), (18, 1168181), (21, 1001298), (42, 500649), (43, 489006), (63, 333766), (86, 244503), (126, 166883), (129, 163002), (258, 81501), (301, 69858), (387, 54334), (602, 34929), (774, 27167), (903, 23286), (1806, 11643), (2709, 7762), (3881, 5418)]