18219971

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{449}}^1$

素因数の和:515

約数の個数: 32

約数和(自身を含む): 24883200

約数和(自身を除く): 6663229

約数列:

[1, 7, 11, 17, 31, 77, 119, 187, 217, 341, 449, 527, 1309, 2387, 3143, 3689, 4939, 5797, 7633, 13919, 34573, 40579, 53431, 83963, 97433, 153109, 236623, 587741, 1071763, 1656361, 2602853, 18219971]

約数ペア:

[(1, 18219971), (7, 2602853), (11, 1656361), (17, 1071763), (31, 587741), (77, 236623), (119, 153109), (187, 97433), (217, 83963), (341, 53431), (449, 40579), (527, 34573), (1309, 13919), (2387, 7633), (3143, 5797), (3689, 4939)]