20428947

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{719}}^1$

素因数の和:784

約数の個数: 48

約数和(自身を含む): 37739520

約数和(自身を除く): 17310573

約数列:

[1, 3, 7, 9, 11, 21, 33, 41, 63, 77, 99, 123, 231, 287, 369, 451, 693, 719, 861, 1353, 2157, 2583, 3157, 4059, 5033, 6471, 7909, 9471, 15099, 23727, 28413, 29479, 45297, 55363, 71181, 88437, 166089, 206353, 265311, 324269, 498267, 619059, 972807, 1857177, 2269883, 2918421, 6809649, 20428947]

約数ペア:

[(1, 20428947), (3, 6809649), (7, 2918421), (9, 2269883), (11, 1857177), (21, 972807), (33, 619059), (41, 498267), (63, 324269), (77, 265311), (99, 206353), (123, 166089), (231, 88437), (287, 71181), (369, 55363), (451, 45297), (693, 29479), (719, 28413), (861, 23727), (1353, 15099), (2157, 9471), (2583, 7909), (3157, 6471), (4059, 5033)]