215520021

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{1069}}^1$

素因数の和:1231

約数の個数: 40

約数和(自身を含む): 341800800

約数和(自身を除く): 126280779

約数列:

[1, 3, 9, 19, 27, 57, 81, 131, 171, 393, 513, 1069, 1179, 1539, 2489, 3207, 3537, 7467, 9621, 10611, 20311, 22401, 28863, 60933, 67203, 86589, 140039, 182799, 201609, 420117, 548397, 1260351, 1645191, 2660741, 3781053, 7982223, 11343159, 23946669, 71840007, 215520021]

約数ペア:

[(1, 215520021), (3, 71840007), (9, 23946669), (19, 11343159), (27, 7982223), (57, 3781053), (81, 2660741), (131, 1645191), (171, 1260351), (393, 548397), (513, 420117), (1069, 201609), (1179, 182799), (1539, 140039), (2489, 86589), (3207, 67203), (3537, 60933), (7467, 28863), (9621, 22401), (10611, 20311)]