20455257

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{131}}^1$

素因数の和:261

約数の個数: 32

約数和(自身を含む): 30007296

約数和(自身を除く): 9552039

約数列:

[1, 3, 23, 31, 69, 73, 93, 131, 219, 393, 713, 1679, 2139, 2263, 3013, 4061, 5037, 6789, 9039, 9563, 12183, 28689, 52049, 93403, 156147, 219949, 280209, 296453, 659847, 889359, 6818419, 20455257]

約数ペア:

[(1, 20455257), (3, 6818419), (23, 889359), (31, 659847), (69, 296453), (73, 280209), (93, 219949), (131, 156147), (219, 93403), (393, 52049), (713, 28689), (1679, 12183), (2139, 9563), (2263, 9039), (3013, 6789), (4061, 5037)]