21770217

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{20327}}^1$

素因数の和:20357

約数の個数: 24

約数和(自身を含む): 38054016

約数和(自身を除く): 16283799

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071, 20327, 60981, 142289, 182943, 345559, 426867, 1036677, 1280601, 2418913, 3110031, 7256739, 21770217]

約数ペア:

[(1, 21770217), (3, 7256739), (7, 3110031), (9, 2418913), (17, 1280601), (21, 1036677), (51, 426867), (63, 345559), (119, 182943), (153, 142289), (357, 60981), (1071, 20327)]