399610

素因数分解:

$2^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{449}}^1$

素因数の和:545

約数の個数: 16

約数和(自身を含む): 729000

約数和(自身を除く): 329390

約数列:

[1, 2, 5, 10, 89, 178, 445, 449, 890, 898, 2245, 4490, 39961, 79922, 199805, 399610]

約数ペア:

[(1, 399610), (2, 199805), (5, 79922), (10, 39961), (89, 4490), (178, 2245), (445, 898), (449, 890)]