278399471

素因数分解:

$7^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{20639}}^1$

素因数の和:20734

約数の個数: 16

約数和(自身を含む): 332881920

約数和(自身を除く): 54482449

約数列:

[1, 7, 41, 47, 287, 329, 1927, 13489, 20639, 144473, 846199, 970033, 5923393, 6790231, 39771353, 278399471]

約数ペア:

[(1, 278399471), (7, 39771353), (41, 6790231), (47, 5923393), (287, 970033), (329, 846199), (1927, 144473), (13489, 20639)]