1821281

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1$

素因数の和:165

約数の個数: 24

約数和(自身を含む): 2407680

約数和(自身を除く): 586399

約数列:

[1, 7, 11, 31, 49, 77, 109, 217, 341, 539, 763, 1199, 1519, 2387, 3379, 5341, 8393, 16709, 23653, 37169, 58751, 165571, 260183, 1821281]

約数ペア:

[(1, 1821281), (7, 260183), (11, 165571), (31, 58751), (49, 37169), (77, 23653), (109, 16709), (217, 8393), (341, 5341), (539, 3379), (763, 2387), (1199, 1519)]