20531478

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{631}}^1$

素因数の和:693

約数の個数: 64

約数和(自身を含む): 49144320

約数和(自身を除く): 28612842

約数列:

[1, 2, 3, 6, 11, 17, 22, 29, 33, 34, 51, 58, 66, 87, 102, 174, 187, 319, 374, 493, 561, 631, 638, 957, 986, 1122, 1262, 1479, 1893, 1914, 2958, 3786, 5423, 6941, 10727, 10846, 13882, 16269, 18299, 20823, 21454, 32181, 32538, 36598, 41646, 54897, 64362, 109794, 117997, 201289, 235994, 311083, 353991, 402578, 603867, 622166, 707982, 933249, 1207734, 1866498, 3421913, 6843826, 10265739, 20531478]

約数ペア:

[(1, 20531478), (2, 10265739), (3, 6843826), (6, 3421913), (11, 1866498), (17, 1207734), (22, 933249), (29, 707982), (33, 622166), (34, 603867), (51, 402578), (58, 353991), (66, 311083), (87, 235994), (102, 201289), (174, 117997), (187, 109794), (319, 64362), (374, 54897), (493, 41646), (561, 36598), (631, 32538), (638, 32181), (957, 21454), (986, 20823), (1122, 18299), (1262, 16269), (1479, 13882), (1893, 10846), (1914, 10727), (2958, 6941), (3786, 5423)]