28216881

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{2143}}^1$

素因数の和:2186

約数の個数: 48

約数和(自身を含む): 53514240

約数和(自身を除く): 25297359

約数列:

[1, 3, 7, 9, 11, 19, 21, 33, 57, 63, 77, 99, 133, 171, 209, 231, 399, 627, 693, 1197, 1463, 1881, 2143, 4389, 6429, 13167, 15001, 19287, 23573, 40717, 45003, 70719, 122151, 135009, 165011, 212157, 285019, 366453, 447887, 495033, 855057, 1343661, 1485099, 2565171, 3135209, 4030983, 9405627, 28216881]

約数ペア:

[(1, 28216881), (3, 9405627), (7, 4030983), (9, 3135209), (11, 2565171), (19, 1485099), (21, 1343661), (33, 855057), (57, 495033), (63, 447887), (77, 366453), (99, 285019), (133, 212157), (171, 165011), (209, 135009), (231, 122151), (399, 70719), (627, 45003), (693, 40717), (1197, 23573), (1463, 19287), (1881, 15001), (2143, 13167), (4389, 6429)]