20758311

素因数分解:

$3^2\times 7^2\times {\mathrm{103}}^1\times {\mathrm{457}}^1$

素因数の和:580

約数の個数: 36

約数和(自身を含む): 35295312

約数和(自身を除く): 14537001

約数列:

[1, 3, 7, 9, 21, 49, 63, 103, 147, 309, 441, 457, 721, 927, 1371, 2163, 3199, 4113, 5047, 6489, 9597, 15141, 22393, 28791, 45423, 47071, 67179, 141213, 201537, 329497, 423639, 988491, 2306479, 2965473, 6919437, 20758311]

約数ペア:

[(1, 20758311), (3, 6919437), (7, 2965473), (9, 2306479), (21, 988491), (49, 423639), (63, 329497), (103, 201537), (147, 141213), (309, 67179), (441, 47071), (457, 45423), (721, 28791), (927, 22393), (1371, 15141), (2163, 9597), (3199, 6489), (4113, 5047)]