20856858

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{641}}^1$

素因数の和:703

約数の個数: 64

約数和(自身を含む): 49921920

約数和(自身を除く): 29065062

約数列:

[1, 2, 3, 6, 11, 17, 22, 29, 33, 34, 51, 58, 66, 87, 102, 174, 187, 319, 374, 493, 561, 638, 641, 957, 986, 1122, 1282, 1479, 1914, 1923, 2958, 3846, 5423, 7051, 10846, 10897, 14102, 16269, 18589, 21153, 21794, 32538, 32691, 37178, 42306, 55767, 65382, 111534, 119867, 204479, 239734, 316013, 359601, 408958, 613437, 632026, 719202, 948039, 1226874, 1896078, 3476143, 6952286, 10428429, 20856858]

約数ペア:

[(1, 20856858), (2, 10428429), (3, 6952286), (6, 3476143), (11, 1896078), (17, 1226874), (22, 948039), (29, 719202), (33, 632026), (34, 613437), (51, 408958), (58, 359601), (66, 316013), (87, 239734), (102, 204479), (174, 119867), (187, 111534), (319, 65382), (374, 55767), (493, 42306), (561, 37178), (638, 32691), (641, 32538), (957, 21794), (986, 21153), (1122, 18589), (1282, 16269), (1479, 14102), (1914, 10897), (1923, 10846), (2958, 7051), (3846, 5423)]