20813247

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{197}}^1$

素因数の和:269

約数の個数: 64

約数和(自身を含む): 39029760

約数和(自身を除く): 18216513

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 43, 63, 91, 117, 129, 189, 197, 273, 301, 351, 387, 559, 591, 819, 903, 1161, 1379, 1677, 1773, 2457, 2561, 2709, 3913, 4137, 5031, 5319, 7683, 8127, 8471, 11739, 12411, 15093, 17927, 23049, 25413, 35217, 37233, 53781, 59297, 69147, 76239, 105651, 110123, 161343, 177891, 228717, 330369, 484029, 533673, 770861, 991107, 1601019, 2312583, 2973321, 6937749, 20813247]

約数ペア:

[(1, 20813247), (3, 6937749), (7, 2973321), (9, 2312583), (13, 1601019), (21, 991107), (27, 770861), (39, 533673), (43, 484029), (63, 330369), (91, 228717), (117, 177891), (129, 161343), (189, 110123), (197, 105651), (273, 76239), (301, 69147), (351, 59297), (387, 53781), (559, 37233), (591, 35217), (819, 25413), (903, 23049), (1161, 17927), (1379, 15093), (1677, 12411), (1773, 11739), (2457, 8471), (2561, 8127), (2709, 7683), (3913, 5319), (4137, 5031)]