21855155

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{20143}}^1$

素因数の和:20186

約数の個数: 16

約数和(自身を含む): 30941184

約数和(自身を除く): 9086029

約数列:

[1, 5, 7, 31, 35, 155, 217, 1085, 20143, 100715, 141001, 624433, 705005, 3122165, 4371031, 21855155]

約数ペア:

[(1, 21855155), (5, 4371031), (7, 3122165), (31, 705005), (35, 624433), (155, 141001), (217, 100715), (1085, 20143)]