20817559

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{193}}^1\times {\mathrm{811}}^1$

素因数の和:1030

約数の個数: 16

約数和(自身を含む): 25204480

約数和(自身を除く): 4386921

約数列:

[1, 7, 19, 133, 193, 811, 1351, 3667, 5677, 15409, 25669, 107863, 156523, 1095661, 2973937, 20817559]

約数ペア:

[(1, 20817559), (7, 2973937), (19, 1095661), (133, 156523), (193, 107863), (811, 25669), (1351, 15409), (3667, 5677)]