389916440

素因数分解:

$2^3\times 5^1\times {\mathrm{9747911}}^1$

素因数の和:9747922

約数の個数: 16

約数和(自身を含む): 877312080

約数和(自身を除く): 487395640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 9747911, 19495822, 38991644, 48739555, 77983288, 97479110, 194958220, 389916440]

約数ペア:

[(1, 389916440), (2, 194958220), (4, 97479110), (5, 77983288), (8, 48739555), (10, 38991644), (20, 19495822), (40, 9747911)]