20685987

素因数分解:

$3^2\times 7^3\times {\mathrm{6701}}^1$

素因数の和:6728

約数の個数: 24

約数和(自身を含む): 34850400

約数和(自身を除く): 14164413

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 343, 441, 1029, 3087, 6701, 20103, 46907, 60309, 140721, 328349, 422163, 985047, 2298443, 2955141, 6895329, 20685987]

約数ペア:

[(1, 20685987), (3, 6895329), (7, 2955141), (9, 2298443), (21, 985047), (49, 422163), (63, 328349), (147, 140721), (343, 60309), (441, 46907), (1029, 20103), (3087, 6701)]