655122980

素因数分解:

$2^2\times 5^1\times {\mathrm{1559}}^1\times {\mathrm{21011}}^1$

素因数の和:22579

約数の個数: 24

約数和(自身を含む): 1376706240

約数和(自身を除く): 721583260

約数列:

[1, 2, 4, 5, 10, 20, 1559, 3118, 6236, 7795, 15590, 21011, 31180, 42022, 84044, 105055, 210110, 420220, 32756149, 65512298, 131024596, 163780745, 327561490, 655122980]

約数ペア:

[(1, 655122980), (2, 327561490), (4, 163780745), (5, 131024596), (10, 65512298), (20, 32756149), (1559, 420220), (3118, 210110), (6236, 105055), (7795, 84044), (15590, 42022), (21011, 31180)]