19928909

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{463}}^1$

素因数の和:537

約数の個数: 32

約数和(自身を含む): 27439104

約数和(自身を除く): 7510195

約数列:

[1, 7, 11, 13, 43, 77, 91, 143, 301, 463, 473, 559, 1001, 3241, 3311, 3913, 5093, 6019, 6149, 19909, 35651, 42133, 43043, 66209, 139363, 218999, 258817, 463463, 1532993, 1811719, 2846987, 19928909]

約数ペア:

[(1, 19928909), (7, 2846987), (11, 1811719), (13, 1532993), (43, 463463), (77, 258817), (91, 218999), (143, 139363), (301, 66209), (463, 43043), (473, 42133), (559, 35651), (1001, 19909), (3241, 6149), (3311, 6019), (3913, 5093)]