2021789

素因数分解:

$7^2\times {\mathrm{11}}^3\times {\mathrm{31}}^1$

素因数の和:78

約数の個数: 24

約数和(自身を含む): 2670336

約数和(自身を除く): 648547

約数列:

[1, 7, 11, 31, 49, 77, 121, 217, 341, 539, 847, 1331, 1519, 2387, 3751, 5929, 9317, 16709, 26257, 41261, 65219, 183799, 288827, 2021789]

約数ペア:

[(1, 2021789), (7, 288827), (11, 183799), (31, 65219), (49, 41261), (77, 26257), (121, 16709), (217, 9317), (341, 5929), (539, 3751), (847, 2387), (1331, 1519)]