28571781

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{163}}^1\times {\mathrm{491}}^1$

素因数の和:681

約数の個数: 32

約数和(自身を含む): 46476288

約数和(自身を除く): 17904507

約数列:

[1, 3, 7, 17, 21, 51, 119, 163, 357, 489, 491, 1141, 1473, 2771, 3423, 3437, 8313, 8347, 10311, 19397, 25041, 58191, 58429, 80033, 175287, 240099, 560231, 1360561, 1680693, 4081683, 9523927, 28571781]

約数ペア:

[(1, 28571781), (3, 9523927), (7, 4081683), (17, 1680693), (21, 1360561), (51, 560231), (119, 240099), (163, 175287), (357, 80033), (489, 58429), (491, 58191), (1141, 25041), (1473, 19397), (2771, 10311), (3423, 8347), (3437, 8313)]