21805917

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{3593}}^1$

素因数の和:3637

約数の個数: 24

約数和(自身を含む): 35307456

約数和(自身を除く): 13501539

約数列:

[1, 3, 7, 17, 21, 51, 119, 289, 357, 867, 2023, 3593, 6069, 10779, 25151, 61081, 75453, 183243, 427567, 1038377, 1282701, 3115131, 7268639, 21805917]

約数ペア:

[(1, 21805917), (3, 7268639), (7, 3115131), (17, 1282701), (21, 1038377), (51, 427567), (119, 183243), (289, 75453), (357, 61081), (867, 25151), (2023, 10779), (3593, 6069)]