21069771

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1\times {\mathrm{89}}^1$

素因数の和:235

約数の個数: 32

約数和(自身を含む): 30689280

約数和(自身を除く): 9619509

約数列:

[1, 3, 23, 47, 69, 73, 89, 141, 219, 267, 1081, 1679, 2047, 3243, 3431, 4183, 5037, 6141, 6497, 10293, 12549, 19491, 78913, 96209, 149431, 236739, 288627, 305359, 448293, 916077, 7023257, 21069771]

約数ペア:

[(1, 21069771), (3, 7023257), (23, 916077), (47, 448293), (69, 305359), (73, 288627), (89, 236739), (141, 149431), (219, 96209), (267, 78913), (1081, 19491), (1679, 12549), (2047, 10293), (3243, 6497), (3431, 6141), (4183, 5037)]