21491185

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{5261}}^1$

素因数の和:5328

約数の個数: 16

約数和(自身を含む): 27783360

約数和(自身を除く): 6292175

約数列:

[1, 5, 19, 43, 95, 215, 817, 4085, 5261, 26305, 99959, 226223, 499795, 1131115, 4298237, 21491185]

約数ペア:

[(1, 21491185), (5, 4298237), (19, 1131115), (43, 499795), (95, 226223), (215, 99959), (817, 26305), (4085, 5261)]