19870208

素因数分解:

$2^9\times {\mathrm{197}}^2$

素因数の和:412

約数の個数: 30

約数和(自身を含む): 39904161

約数和(自身を除く): 20033953

約数列:

[1, 2, 4, 8, 16, 32, 64, 128, 197, 256, 394, 512, 788, 1576, 3152, 6304, 12608, 25216, 38809, 50432, 77618, 100864, 155236, 310472, 620944, 1241888, 2483776, 4967552, 9935104, 19870208]

約数ペア:

[(1, 19870208), (2, 9935104), (4, 4967552), (8, 2483776), (16, 1241888), (32, 620944), (64, 310472), (128, 155236), (197, 100864), (256, 77618), (394, 50432), (512, 38809), (788, 25216), (1576, 12608), (3152, 6304)]