21387039

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{317}}^1\times {\mathrm{523}}^1$

素因数の和:886

約数の個数: 16

約数和(自身を含む): 29327232

約数和(自身を除く): 7940193

約数列:

[1, 3, 43, 129, 317, 523, 951, 1569, 13631, 22489, 40893, 67467, 165791, 497373, 7129013, 21387039]

約数ペア:

[(1, 21387039), (3, 7129013), (43, 497373), (129, 165791), (317, 67467), (523, 40893), (951, 22489), (1569, 13631)]