21121947

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{1051}}^1$

素因数の和:1104

約数の個数: 48

約数和(自身を含む): 39386880

約数和(自身を除く): 18264933

約数列:

[1, 3, 7, 9, 11, 21, 29, 33, 63, 77, 87, 99, 203, 231, 261, 319, 609, 693, 957, 1051, 1827, 2233, 2871, 3153, 6699, 7357, 9459, 11561, 20097, 22071, 30479, 34683, 66213, 80927, 91437, 104049, 213353, 242781, 274311, 335269, 640059, 728343, 1005807, 1920177, 2346883, 3017421, 7040649, 21121947]

約数ペア:

[(1, 21121947), (3, 7040649), (7, 3017421), (9, 2346883), (11, 1920177), (21, 1005807), (29, 728343), (33, 640059), (63, 335269), (77, 274311), (87, 242781), (99, 213353), (203, 104049), (231, 91437), (261, 80927), (319, 66213), (609, 34683), (693, 30479), (957, 22071), (1051, 20097), (1827, 11561), (2233, 9459), (2871, 7357), (3153, 6699)]