21139956

素因数分解:

$2^2\times 3^2\times {\mathrm{29}}^1\times {\mathrm{20249}}^1$

素因数の和:20288

約数の個数: 36

約数和(自身を含む): 55282500

約数和(自身を除く): 34142544

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 29, 36, 58, 87, 116, 174, 261, 348, 522, 1044, 20249, 40498, 60747, 80996, 121494, 182241, 242988, 364482, 587221, 728964, 1174442, 1761663, 2348884, 3523326, 5284989, 7046652, 10569978, 21139956]

約数ペア:

[(1, 21139956), (2, 10569978), (3, 7046652), (4, 5284989), (6, 3523326), (9, 2348884), (12, 1761663), (18, 1174442), (29, 728964), (36, 587221), (58, 364482), (87, 242988), (116, 182241), (174, 121494), (261, 80996), (348, 60747), (522, 40498), (1044, 20249)]