20768121

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{181}}^1$

素因数の和:278

約数の個数: 48

約数和(自身を含む): 35206080

約数和(自身を除く): 14437959

約数列:

[1, 3, 9, 11, 19, 33, 57, 61, 99, 171, 181, 183, 209, 543, 549, 627, 671, 1159, 1629, 1881, 1991, 2013, 3439, 3477, 5973, 6039, 10317, 10431, 11041, 12749, 17919, 30951, 33123, 37829, 38247, 99369, 113487, 114741, 121451, 209779, 340461, 364353, 629337, 1093059, 1888011, 2307569, 6922707, 20768121]

約数ペア:

[(1, 20768121), (3, 6922707), (9, 2307569), (11, 1888011), (19, 1093059), (33, 629337), (57, 364353), (61, 340461), (99, 209779), (171, 121451), (181, 114741), (183, 113487), (209, 99369), (543, 38247), (549, 37829), (627, 33123), (671, 30951), (1159, 17919), (1629, 12749), (1881, 11041), (1991, 10431), (2013, 10317), (3439, 6039), (3477, 5973)]