20380147221

素因数分解:

$3^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{443}}^1\times {\mathrm{21269}}^1$

素因数の和:21825

約数の個数: 32

約数和(自身を含む): 31429232640

約数和(自身を除く): 11049085419

約数列:

[1, 3, 7, 21, 103, 309, 443, 721, 1329, 2163, 3101, 9303, 21269, 45629, 63807, 136887, 148883, 319403, 446649, 958209, 2190707, 6572121, 9422167, 15334949, 28266501, 46004847, 65955169, 197865507, 970483201, 2911449603, 6793382407, 20380147221]

約数ペア:

[(1, 20380147221), (3, 6793382407), (7, 2911449603), (21, 970483201), (103, 197865507), (309, 65955169), (443, 46004847), (721, 28266501), (1329, 15334949), (2163, 9422167), (3101, 6572121), (9303, 2190707), (21269, 958209), (45629, 446649), (63807, 319403), (136887, 148883)]