18720758

素因数分解:

$2^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{1237}}^1$

素因数の和:1316

約数の個数: 32

約数和(自身を含む): 34228224

約数和(自身を除く): 15507466

約数列:

[1, 2, 7, 14, 23, 46, 47, 94, 161, 322, 329, 658, 1081, 1237, 2162, 2474, 7567, 8659, 15134, 17318, 28451, 56902, 58139, 116278, 199157, 398314, 406973, 813946, 1337197, 2674394, 9360379, 18720758]

約数ペア:

[(1, 18720758), (2, 9360379), (7, 2674394), (14, 1337197), (23, 813946), (46, 406973), (47, 398314), (94, 199157), (161, 116278), (322, 58139), (329, 56902), (658, 28451), (1081, 17318), (1237, 15134), (2162, 8659), (2474, 7567)]