20704180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{3607}}^1$

素因数の和:3664

約数の個数: 48

約数和(自身を含む): 50916096

約数和(自身を除く): 30211916

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 41, 70, 82, 140, 164, 205, 287, 410, 574, 820, 1148, 1435, 2870, 3607, 5740, 7214, 14428, 18035, 25249, 36070, 50498, 72140, 100996, 126245, 147887, 252490, 295774, 504980, 591548, 739435, 1035209, 1478870, 2070418, 2957740, 4140836, 5176045, 10352090, 20704180]

約数ペア:

[(1, 20704180), (2, 10352090), (4, 5176045), (5, 4140836), (7, 2957740), (10, 2070418), (14, 1478870), (20, 1035209), (28, 739435), (35, 591548), (41, 504980), (70, 295774), (82, 252490), (140, 147887), (164, 126245), (205, 100996), (287, 72140), (410, 50498), (574, 36070), (820, 25249), (1148, 18035), (1435, 14428), (2870, 7214), (3607, 5740)]