20646171

素因数分解:

$3^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2801}}^1$

素因数の和:2833

約数の個数: 40

約数和(自身を含む): 37972704

約数和(自身を除く): 17326533

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 81, 91, 117, 189, 273, 351, 567, 819, 1053, 2457, 2801, 7371, 8403, 19607, 25209, 36413, 58821, 75627, 109239, 176463, 226881, 254891, 327717, 529389, 764673, 983151, 1588167, 2294019, 2949453, 6882057, 20646171]

約数ペア:

[(1, 20646171), (3, 6882057), (7, 2949453), (9, 2294019), (13, 1588167), (21, 983151), (27, 764673), (39, 529389), (63, 327717), (81, 254891), (91, 226881), (117, 176463), (189, 109239), (273, 75627), (351, 58821), (567, 36413), (819, 25209), (1053, 19607), (2457, 8403), (2801, 7371)]