18575557

素因数分解:

$7^2\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{241}}^1$

素因数の和:290

約数の個数: 36

約数和(自身を含む): 25684428

約数和(自身を除く): 7108871

約数列:

[1, 7, 11, 13, 49, 77, 91, 121, 143, 241, 539, 637, 847, 1001, 1573, 1687, 2651, 3133, 5929, 7007, 11011, 11809, 18557, 21931, 29161, 34463, 77077, 129899, 153517, 204127, 241241, 379093, 1428889, 1688687, 2653651, 18575557]

約数ペア:

[(1, 18575557), (7, 2653651), (11, 1688687), (13, 1428889), (49, 379093), (77, 241241), (91, 204127), (121, 153517), (143, 129899), (241, 77077), (539, 34463), (637, 29161), (847, 21931), (1001, 18557), (1573, 11809), (1687, 11011), (2651, 7007), (3133, 5929)]