21309869

素因数分解:

$7^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{809}}^1$

素因数の和:940

約数の個数: 16

約数和(自身を含む): 25194240

約数和(自身を除く): 3884371

約数列:

[1, 7, 53, 71, 371, 497, 809, 3763, 5663, 26341, 42877, 57439, 300139, 402073, 3044267, 21309869]

約数ペア:

[(1, 21309869), (7, 3044267), (53, 402073), (71, 300139), (371, 57439), (497, 42877), (809, 26341), (3763, 5663)]