257857341

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{646259}}^1$

素因数の和:646288

約数の個数: 16

約数和(自身を含む): 413606400

約数和(自身を除く): 155749059

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 646259, 1938777, 4523813, 12278921, 13571439, 36836763, 85952447, 257857341]

約数ペア:

[(1, 257857341), (3, 85952447), (7, 36836763), (19, 13571439), (21, 12278921), (57, 4523813), (133, 1938777), (399, 646259)]