20690540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79579}}^1$

素因数の和:79601

約数の個数: 24

約数和(自身を含む): 46793040

約数和(自身を除く): 26102500

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 79579, 159158, 318316, 397895, 795790, 1034527, 1591580, 2069054, 4138108, 5172635, 10345270, 20690540]

約数ペア:

[(1, 20690540), (2, 10345270), (4, 5172635), (5, 4138108), (10, 2069054), (13, 1591580), (20, 1034527), (26, 795790), (52, 397895), (65, 318316), (130, 159158), (260, 79579)]