399042440

素因数分解:

$2^3\times 5^1\times {\mathrm{9976061}}^1$

素因数の和:9976072

約数の個数: 16

約数和(自身を含む): 897845580

約数和(自身を除く): 498803140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 9976061, 19952122, 39904244, 49880305, 79808488, 99760610, 199521220, 399042440]

約数ペア:

[(1, 399042440), (2, 199521220), (4, 99760610), (5, 79808488), (8, 49880305), (10, 39904244), (20, 19952122), (40, 9976061)]