20428221

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{13171}}^1$

素因数の和:13232

約数の個数: 16

約数和(自身を含む): 30348288

約数和(自身を除く): 9920067

約数列:

[1, 3, 11, 33, 47, 141, 517, 1551, 13171, 39513, 144881, 434643, 619037, 1857111, 6809407, 20428221]

約数ペア:

[(1, 20428221), (3, 6809407), (11, 1857111), (33, 619037), (47, 434643), (141, 144881), (517, 39513), (1551, 13171)]