20107780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{1187}}^1$

素因数の和:1225

約数の個数: 72

約数和(自身を含む): 53089344

約数和(自身を除く): 32981564

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 121, 140, 154, 220, 242, 308, 385, 484, 605, 770, 847, 1187, 1210, 1540, 1694, 2374, 2420, 3388, 4235, 4748, 5935, 8309, 8470, 11870, 13057, 16618, 16940, 23740, 26114, 33236, 41545, 52228, 65285, 83090, 91399, 130570, 143627, 166180, 182798, 261140, 287254, 365596, 456995, 574508, 718135, 913990, 1005389, 1436270, 1827980, 2010778, 2872540, 4021556, 5026945, 10053890, 20107780]

約数ペア:

[(1, 20107780), (2, 10053890), (4, 5026945), (5, 4021556), (7, 2872540), (10, 2010778), (11, 1827980), (14, 1436270), (20, 1005389), (22, 913990), (28, 718135), (35, 574508), (44, 456995), (55, 365596), (70, 287254), (77, 261140), (110, 182798), (121, 166180), (140, 143627), (154, 130570), (220, 91399), (242, 83090), (308, 65285), (385, 52228), (484, 41545), (605, 33236), (770, 26114), (847, 23740), (1187, 16940), (1210, 16618), (1540, 13057), (1694, 11870), (2374, 8470), (2420, 8309), (3388, 5935), (4235, 4748)]