397803

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{997}}^1$

素因数の和:1026

約数の個数: 16

約数和(自身を含む): 638720

約数和(自身を除く): 240917

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 997, 2991, 6979, 18943, 20937, 56829, 132601, 397803]

約数ペア:

[(1, 397803), (3, 132601), (7, 56829), (19, 20937), (21, 18943), (57, 6979), (133, 2991), (399, 997)]