20705391

素因数分解:

$3^2\times 7^2\times {\mathrm{29}}^1\times {\mathrm{1619}}^1$

素因数の和:1668

約数の個数: 36

約数和(自身を含む): 36012600

約数和(自身を除く): 15307209

約数列:

[1, 3, 7, 9, 21, 29, 49, 63, 87, 147, 203, 261, 441, 609, 1421, 1619, 1827, 4263, 4857, 11333, 12789, 14571, 33999, 46951, 79331, 101997, 140853, 237993, 328657, 422559, 713979, 985971, 2300599, 2957913, 6901797, 20705391]

約数ペア:

[(1, 20705391), (3, 6901797), (7, 2957913), (9, 2300599), (21, 985971), (29, 713979), (49, 422559), (63, 328657), (87, 237993), (147, 140853), (203, 101997), (261, 79331), (441, 46951), (609, 33999), (1421, 14571), (1619, 12789), (1827, 11333), (4263, 4857)]