21491708

素因数分解:

$2^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{97}}^1\times {\mathrm{193}}^1$

素因数の和:342

約数の個数: 48

約数和(自身を含む): 44716224

約数和(自身を除く): 23224516

約数列:

[1, 2, 4, 7, 14, 28, 41, 82, 97, 164, 193, 194, 287, 386, 388, 574, 679, 772, 1148, 1351, 1358, 2702, 2716, 3977, 5404, 7913, 7954, 15826, 15908, 18721, 27839, 31652, 37442, 55391, 55678, 74884, 110782, 111356, 131047, 221564, 262094, 524188, 767561, 1535122, 3070244, 5372927, 10745854, 21491708]

約数ペア:

[(1, 21491708), (2, 10745854), (4, 5372927), (7, 3070244), (14, 1535122), (28, 767561), (41, 524188), (82, 262094), (97, 221564), (164, 131047), (193, 111356), (194, 110782), (287, 74884), (386, 55678), (388, 55391), (574, 37442), (679, 31652), (772, 27839), (1148, 18721), (1351, 15908), (1358, 15826), (2702, 7954), (2716, 7913), (3977, 5404)]