21796621

素因数分解:

$7^3\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{109}}^1$

素因数の和:194

約数の個数: 32

約数和(自身を含む): 28512000

約数和(自身を除く): 6715379

約数列:

[1, 7, 11, 49, 53, 77, 109, 343, 371, 539, 583, 763, 1199, 2597, 3773, 4081, 5341, 5777, 8393, 18179, 28567, 37387, 40439, 58751, 63547, 199969, 283073, 411257, 444829, 1981511, 3113803, 21796621]

約数ペア:

[(1, 21796621), (7, 3113803), (11, 1981511), (49, 444829), (53, 411257), (77, 283073), (109, 199969), (343, 63547), (371, 58751), (539, 40439), (583, 37387), (763, 28567), (1199, 18179), (2597, 8393), (3773, 5777), (4081, 5341)]