21123201

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{359}}^1\times {\mathrm{1783}}^1$

素因数の和:2156

約数の個数: 16

約数和(自身を含む): 30827520

約数和(自身を除く): 9704319

約数列:

[1, 3, 11, 33, 359, 1077, 1783, 3949, 5349, 11847, 19613, 58839, 640097, 1920291, 7041067, 21123201]

約数ペア:

[(1, 21123201), (3, 7041067), (11, 1920291), (33, 640097), (359, 58839), (1077, 19613), (1783, 11847), (3949, 5349)]