278325879

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{193}}^1\times {\mathrm{359}}^1$

素因数の和:671

約数の個数: 32

約数和(自身を含む): 406748160

約数和(自身を除く): 128422281

約数列:

[1, 3, 13, 39, 103, 193, 309, 359, 579, 1077, 1339, 2509, 4017, 4667, 7527, 14001, 19879, 36977, 59637, 69287, 110931, 207861, 258427, 480701, 775281, 900731, 1442103, 2702193, 7136561, 21409683, 92775293, 278325879]

約数ペア:

[(1, 278325879), (3, 92775293), (13, 21409683), (39, 7136561), (103, 2702193), (193, 1442103), (309, 900731), (359, 775281), (579, 480701), (1077, 258427), (1339, 207861), (2509, 110931), (4017, 69287), (4667, 59637), (7527, 36977), (14001, 19879)]