20495867

素因数分解:

$7^2\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{131}}^1$

素因数の和:279

約数の個数: 24

約数和(自身を含む): 25039872

約数和(自身を除く): 4544005

約数列:

[1, 7, 31, 49, 103, 131, 217, 721, 917, 1519, 3193, 4061, 5047, 6419, 13493, 22351, 28427, 94451, 156457, 198989, 418283, 661157, 2927981, 20495867]

約数ペア:

[(1, 20495867), (7, 2927981), (31, 661157), (49, 418283), (103, 198989), (131, 156457), (217, 94451), (721, 28427), (917, 22351), (1519, 13493), (3193, 6419), (4061, 5047)]