21085185

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{7517}}^1$

素因数の和:7553

約数の個数: 32

約数和(自身を含む): 38973312

約数和(自身を除く): 17888127

約数列:

[1, 3, 5, 11, 15, 17, 33, 51, 55, 85, 165, 187, 255, 561, 935, 2805, 7517, 22551, 37585, 82687, 112755, 127789, 248061, 383367, 413435, 638945, 1240305, 1405679, 1916835, 4217037, 7028395, 21085185]

約数ペア:

[(1, 21085185), (3, 7028395), (5, 4217037), (11, 1916835), (15, 1405679), (17, 1240305), (33, 638945), (51, 413435), (55, 383367), (85, 248061), (165, 127789), (187, 112755), (255, 82687), (561, 37585), (935, 22551), (2805, 7517)]