21069818

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1$

素因数の和:179

約数の個数: 64

約数和(自身を含む): 41803776

約数和(自身を除く): 20733958

約数列:

[1, 2, 7, 11, 14, 22, 41, 47, 71, 77, 82, 94, 142, 154, 287, 329, 451, 497, 517, 574, 658, 781, 902, 994, 1034, 1562, 1927, 2911, 3157, 3337, 3619, 3854, 5467, 5822, 6314, 6674, 7238, 10934, 13489, 20377, 21197, 23359, 26978, 32021, 36707, 40754, 42394, 46718, 64042, 73414, 136817, 148379, 224147, 256949, 273634, 296758, 448294, 513898, 957719, 1504987, 1915438, 3009974, 10534909, 21069818]

約数ペア:

[(1, 21069818), (2, 10534909), (7, 3009974), (11, 1915438), (14, 1504987), (22, 957719), (41, 513898), (47, 448294), (71, 296758), (77, 273634), (82, 256949), (94, 224147), (142, 148379), (154, 136817), (287, 73414), (329, 64042), (451, 46718), (497, 42394), (517, 40754), (574, 36707), (658, 32021), (781, 26978), (902, 23359), (994, 21197), (1034, 20377), (1562, 13489), (1927, 10934), (2911, 7238), (3157, 6674), (3337, 6314), (3619, 5822), (3854, 5467)]