399454

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{271}}^1$

素因数の和:351

約数の個数: 16

約数和(自身を含む): 665856

約数和(自身を除く): 266402

約数列:

[1, 2, 11, 22, 67, 134, 271, 542, 737, 1474, 2981, 5962, 18157, 36314, 199727, 399454]

約数ペア:

[(1, 399454), (2, 199727), (11, 36314), (22, 18157), (67, 5962), (134, 2981), (271, 1474), (542, 737)]