81282380

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{213901}}^1$

素因数の和:213929

約数の個数: 24

約数和(自身を含む): 179677680

約数和(自身を除く): 98395300

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 213901, 427802, 855604, 1069505, 2139010, 4064119, 4278020, 8128238, 16256476, 20320595, 40641190, 81282380]

約数ペア:

[(1, 81282380), (2, 40641190), (4, 20320595), (5, 16256476), (10, 8128238), (19, 4278020), (20, 4064119), (38, 2139010), (76, 1069505), (95, 855604), (190, 427802), (380, 213901)]