20217280

素因数分解:

$2^6\times 5^1\times {\mathrm{63179}}^1$

素因数の和:63196

約数の個数: 28

約数和(自身を含む): 48143160

約数和(自身を除く): 27925880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 63179, 126358, 252716, 315895, 505432, 631790, 1010864, 1263580, 2021728, 2527160, 4043456, 5054320, 10108640, 20217280]

約数ペア:

[(1, 20217280), (2, 10108640), (4, 5054320), (5, 4043456), (8, 2527160), (10, 2021728), (16, 1263580), (20, 1010864), (32, 631790), (40, 505432), (64, 315895), (80, 252716), (160, 126358), (320, 63179)]