21000659405

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{152671}}^1$

素因数の和:152789

約数の個数: 32

約数和(自身を含む): 28624167936

約数和(自身を除く): 7623508531

約数列:

[1, 5, 11, 41, 55, 61, 205, 305, 451, 671, 2255, 2501, 3355, 12505, 27511, 137555, 152671, 763355, 1679381, 6259511, 8396905, 9312931, 31297555, 46564655, 68854621, 102442241, 344273105, 381830171, 512211205, 1909150855, 4200131881, 21000659405]

約数ペア:

[(1, 21000659405), (5, 4200131881), (11, 1909150855), (41, 512211205), (55, 381830171), (61, 344273105), (205, 102442241), (305, 68854621), (451, 46564655), (671, 31297555), (2255, 9312931), (2501, 8396905), (3355, 6259511), (12505, 1679381), (27511, 763355), (137555, 152671)]