20639521

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{227}}^1\times {\mathrm{419}}^1$

素因数の和:684

約数の個数: 16

約数和(自身を含む): 24514560

約数和(自身を除く): 3875039

約数列:

[1, 7, 31, 217, 227, 419, 1589, 2933, 7037, 12989, 49259, 90923, 95113, 665791, 2948503, 20639521]

約数ペア:

[(1, 20639521), (7, 2948503), (31, 665791), (217, 95113), (227, 90923), (419, 49259), (1589, 12989), (2933, 7037)]