20810185

素因数分解:

$5^1\times {\mathrm{11}}^3\times {\mathrm{53}}^1\times {\mathrm{59}}^1$

素因数の和:150

約数の個数: 32

約数和(自身を含む): 28460160

約数和(自身を除く): 7649975

約数列:

[1, 5, 11, 53, 55, 59, 121, 265, 295, 583, 605, 649, 1331, 2915, 3127, 3245, 6413, 6655, 7139, 15635, 32065, 34397, 35695, 70543, 78529, 171985, 352715, 378367, 392645, 1891835, 4162037, 20810185]

約数ペア:

[(1, 20810185), (5, 4162037), (11, 1891835), (53, 392645), (55, 378367), (59, 352715), (121, 171985), (265, 78529), (295, 70543), (583, 35695), (605, 34397), (649, 32065), (1331, 15635), (2915, 7139), (3127, 6655), (3245, 6413)]