20564859

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{199}}^1$

素因数の和:272

約数の個数: 48

約数和(自身を含む): 34656000

約数和(自身を除く): 14091141

約数列:

[1, 3, 7, 19, 21, 37, 49, 57, 111, 133, 147, 199, 259, 399, 597, 703, 777, 931, 1393, 1813, 2109, 2793, 3781, 4179, 4921, 5439, 7363, 9751, 11343, 14763, 22089, 26467, 29253, 34447, 51541, 79401, 103341, 139897, 154623, 185269, 360787, 419691, 555807, 979279, 1082361, 2937837, 6854953, 20564859]

約数ペア:

[(1, 20564859), (3, 6854953), (7, 2937837), (19, 1082361), (21, 979279), (37, 555807), (49, 419691), (57, 360787), (111, 185269), (133, 154623), (147, 139897), (199, 103341), (259, 79401), (399, 51541), (597, 34447), (703, 29253), (777, 26467), (931, 22089), (1393, 14763), (1813, 11343), (2109, 9751), (2793, 7363), (3781, 5439), (4179, 4921)]