19883017

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{109}}^1$

素因数の和:253

約数の個数: 32

約数和(自身を含む): 26357760

約数和(自身を除く): 6474743

約数列:

[1, 7, 11, 23, 77, 103, 109, 161, 253, 721, 763, 1133, 1199, 1771, 2369, 2507, 7931, 8393, 11227, 16583, 17549, 26059, 27577, 78589, 123497, 182413, 193039, 258221, 864479, 1807547, 2840431, 19883017]

約数ペア:

[(1, 19883017), (7, 2840431), (11, 1807547), (23, 864479), (77, 258221), (103, 193039), (109, 182413), (161, 123497), (253, 78589), (721, 27577), (763, 26059), (1133, 17549), (1199, 16583), (1771, 11227), (2369, 8393), (2507, 7931)]