19561689

素因数分解:

$3^3\times 7^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1$

素因数の和:171

約数の個数: 64

約数和(自身を含む): 35481600

約数和(自身を除く): 15919911

約数列:

[1, 3, 7, 9, 21, 27, 29, 43, 63, 83, 87, 129, 189, 203, 249, 261, 301, 387, 581, 609, 747, 783, 903, 1161, 1247, 1743, 1827, 2241, 2407, 2709, 3569, 3741, 5229, 5481, 7221, 8127, 8729, 10707, 11223, 15687, 16849, 21663, 24983, 26187, 32121, 33669, 50547, 64989, 74949, 78561, 96363, 103501, 151641, 224847, 235683, 310503, 454923, 674541, 724507, 931509, 2173521, 2794527, 6520563, 19561689]

約数ペア:

[(1, 19561689), (3, 6520563), (7, 2794527), (9, 2173521), (21, 931509), (27, 724507), (29, 674541), (43, 454923), (63, 310503), (83, 235683), (87, 224847), (129, 151641), (189, 103501), (203, 96363), (249, 78561), (261, 74949), (301, 64989), (387, 50547), (581, 33669), (609, 32121), (747, 26187), (783, 24983), (903, 21663), (1161, 16849), (1247, 15687), (1743, 11223), (1827, 10707), (2241, 8729), (2407, 8127), (2709, 7221), (3569, 5481), (3741, 5229)]