21258657

素因数分解:

$3^2\times 7^1\times {\mathrm{127}}^1\times {\mathrm{2657}}^1$

素因数の和:2797

約数の個数: 24

約数和(自身を含む): 35383296

約数和(自身を除く): 14124639

約数列:

[1, 3, 7, 9, 21, 63, 127, 381, 889, 1143, 2657, 2667, 7971, 8001, 18599, 23913, 55797, 167391, 337439, 1012317, 2362073, 3036951, 7086219, 21258657]

約数ペア:

[(1, 21258657), (3, 7086219), (7, 3036951), (9, 2362073), (21, 1012317), (63, 337439), (127, 167391), (381, 55797), (889, 23913), (1143, 18599), (2657, 8001), (2667, 7971)]