20519905

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{523}}^1$

素因数の和:613

約数の個数: 32

約数和(自身を含む): 30182400

約数和(自身を除く): 9662495

約数列:

[1, 5, 7, 19, 35, 59, 95, 133, 295, 413, 523, 665, 1121, 2065, 2615, 3661, 5605, 7847, 9937, 18305, 30857, 39235, 49685, 69559, 154285, 215999, 347795, 586283, 1079995, 2931415, 4103981, 20519905]

約数ペア:

[(1, 20519905), (5, 4103981), (7, 2931415), (19, 1079995), (35, 586283), (59, 347795), (95, 215999), (133, 154285), (295, 69559), (413, 49685), (523, 39235), (665, 30857), (1121, 18305), (2065, 9937), (2615, 7847), (3661, 5605)]