20208640

素因数分解:

$2^{10}\times 5^1\times {\mathrm{3947}}^1$

素因数の和:3972

約数の個数: 44

約数和(自身を含む): 48489336

約数和(自身を除く): 28280696

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 2560, 3947, 5120, 7894, 15788, 19735, 31576, 39470, 63152, 78940, 126304, 157880, 252608, 315760, 505216, 631520, 1010432, 1263040, 2020864, 2526080, 4041728, 5052160, 10104320, 20208640]

約数ペア:

[(1, 20208640), (2, 10104320), (4, 5052160), (5, 4041728), (8, 2526080), (10, 2020864), (16, 1263040), (20, 1010432), (32, 631520), (40, 505216), (64, 315760), (80, 252608), (128, 157880), (160, 126304), (256, 78940), (320, 63152), (512, 39470), (640, 31576), (1024, 19735), (1280, 15788), (2560, 7894), (3947, 5120)]