20690488

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{293}}^1$

素因数の和:416

約数の個数: 64

約数和(自身を含む): 48404160

約数和(自身を除く): 27713672

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 97, 104, 182, 194, 293, 364, 388, 586, 679, 728, 776, 1172, 1261, 1358, 2051, 2344, 2522, 2716, 3809, 4102, 5044, 5432, 7618, 8204, 8827, 10088, 15236, 16408, 17654, 26663, 28421, 30472, 35308, 53326, 56842, 70616, 106652, 113684, 198947, 213304, 227368, 369473, 397894, 738946, 795788, 1477892, 1591576, 2586311, 2955784, 5172622, 10345244, 20690488]

約数ペア:

[(1, 20690488), (2, 10345244), (4, 5172622), (7, 2955784), (8, 2586311), (13, 1591576), (14, 1477892), (26, 795788), (28, 738946), (52, 397894), (56, 369473), (91, 227368), (97, 213304), (104, 198947), (182, 113684), (194, 106652), (293, 70616), (364, 56842), (388, 53326), (586, 35308), (679, 30472), (728, 28421), (776, 26663), (1172, 17654), (1261, 16408), (1358, 15236), (2051, 10088), (2344, 8827), (2522, 8204), (2716, 7618), (3809, 5432), (4102, 5044)]