21076209

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1789}}^1$

素因数の和:1830

約数の個数: 48

約数和(自身を含む): 40210560

約数和(自身を除く): 19134351

約数列:

[1, 3, 7, 9, 11, 17, 21, 33, 51, 63, 77, 99, 119, 153, 187, 231, 357, 561, 693, 1071, 1309, 1683, 1789, 3927, 5367, 11781, 12523, 16101, 19679, 30413, 37569, 59037, 91239, 112707, 137753, 177111, 212891, 273717, 334543, 413259, 638673, 1003629, 1239777, 1916019, 2341801, 3010887, 7025403, 21076209]

約数ペア:

[(1, 21076209), (3, 7025403), (7, 3010887), (9, 2341801), (11, 1916019), (17, 1239777), (21, 1003629), (33, 638673), (51, 413259), (63, 334543), (77, 273717), (99, 212891), (119, 177111), (153, 137753), (187, 112707), (231, 91239), (357, 59037), (561, 37569), (693, 30413), (1071, 19679), (1309, 16101), (1683, 12523), (1789, 11781), (3927, 5367)]