20519639

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1$

素因数の和:191

約数の個数: 32

約数和(自身を含む): 26127360

約数和(自身を除く): 5607721

約数列:

[1, 7, 19, 41, 53, 71, 133, 287, 371, 497, 779, 1007, 1349, 2173, 2911, 3763, 5453, 7049, 9443, 15211, 20377, 26341, 41287, 55309, 71497, 154283, 289009, 387163, 500479, 1079981, 2931377, 20519639]

約数ペア:

[(1, 20519639), (7, 2931377), (19, 1079981), (41, 500479), (53, 387163), (71, 289009), (133, 154283), (287, 71497), (371, 55309), (497, 41287), (779, 26341), (1007, 20377), (1349, 15211), (2173, 9443), (2911, 7049), (3763, 5453)]