388670420

素因数分解:

$2^2\times 5^1\times {\mathrm{19433521}}^1$

素因数の和:19433530

約数の個数: 12

約数和(自身を含む): 816207924

約数和(自身を除く): 427537504

約数列:

[1, 2, 4, 5, 10, 20, 19433521, 38867042, 77734084, 97167605, 194335210, 388670420]

約数ペア:

[(1, 388670420), (2, 194335210), (4, 97167605), (5, 77734084), (10, 38867042), (20, 19433521)]