20971041

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{311}}^1$

素因数の和:366

約数の個数: 48

約数和(自身を含む): 36541440

約数和(自身を除く): 15570399

約数列:

[1, 3, 7, 13, 19, 21, 39, 57, 91, 133, 169, 247, 273, 311, 399, 507, 741, 933, 1183, 1729, 2177, 3211, 3549, 4043, 5187, 5909, 6531, 9633, 12129, 17727, 22477, 28301, 41363, 52559, 67431, 76817, 84903, 124089, 157677, 230451, 367913, 537719, 998621, 1103739, 1613157, 2995863, 6990347, 20971041]

約数ペア:

[(1, 20971041), (3, 6990347), (7, 2995863), (13, 1613157), (19, 1103739), (21, 998621), (39, 537719), (57, 367913), (91, 230451), (133, 157677), (169, 124089), (247, 84903), (273, 76817), (311, 67431), (399, 52559), (507, 41363), (741, 28301), (933, 22477), (1183, 17727), (1729, 12129), (2177, 9633), (3211, 6531), (3549, 5909), (4043, 5187)]