20715513

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^3\times {\mathrm{449}}^1$

素因数の和:498

約数の個数: 32

約数和(自身を含む): 34272000

約数和(自身を除く): 13556487

約数列:

[1, 3, 7, 13, 21, 39, 91, 169, 273, 449, 507, 1183, 1347, 2197, 3143, 3549, 5837, 6591, 9429, 15379, 17511, 40859, 46137, 75881, 122577, 227643, 531167, 986453, 1593501, 2959359, 6905171, 20715513]

約数ペア:

[(1, 20715513), (3, 6905171), (7, 2959359), (13, 1593501), (21, 986453), (39, 531167), (91, 227643), (169, 122577), (273, 75881), (449, 46137), (507, 40859), (1183, 17511), (1347, 15379), (2197, 9429), (3143, 6591), (3549, 5837)]