21809538

素因数分解:

$2^1\times 3^2\times {\mathrm{17}}^1\times {\mathrm{263}}^1\times {\mathrm{271}}^1$

素因数の和:559

約数の個数: 48

約数和(自身を含む): 50409216

約数和(自身を除く): 28599678

約数列:

[1, 2, 3, 6, 9, 17, 18, 34, 51, 102, 153, 263, 271, 306, 526, 542, 789, 813, 1578, 1626, 2367, 2439, 4471, 4607, 4734, 4878, 8942, 9214, 13413, 13821, 26826, 27642, 40239, 41463, 71273, 80478, 82926, 142546, 213819, 427638, 641457, 1211641, 1282914, 2423282, 3634923, 7269846, 10904769, 21809538]

約数ペア:

[(1, 21809538), (2, 10904769), (3, 7269846), (6, 3634923), (9, 2423282), (17, 1282914), (18, 1211641), (34, 641457), (51, 427638), (102, 213819), (153, 142546), (263, 82926), (271, 80478), (306, 71273), (526, 41463), (542, 40239), (789, 27642), (813, 26826), (1578, 13821), (1626, 13413), (2367, 9214), (2439, 8942), (4471, 4878), (4607, 4734)]