21351681

素因数分解:

$3^7\times {\mathrm{13}}^1\times {\mathrm{751}}^1$

素因数の和:785

約数の個数: 32

約数和(自身を含む): 34531840

約数和(自身を除く): 13180159

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 243, 351, 729, 751, 1053, 2187, 2253, 3159, 6759, 9477, 9763, 20277, 28431, 29289, 60831, 87867, 182493, 263601, 547479, 790803, 1642437, 2372409, 7117227, 21351681]

約数ペア:

[(1, 21351681), (3, 7117227), (9, 2372409), (13, 1642437), (27, 790803), (39, 547479), (81, 263601), (117, 182493), (243, 87867), (351, 60831), (729, 29289), (751, 28431), (1053, 20277), (2187, 9763), (2253, 9477), (3159, 6759)]