128928640

素因数分解:

$2^7\times 5^1\times {\mathrm{201451}}^1$

素因数の和:201470

約数の個数: 32

約数和(自身を含む): 308221560

約数和(自身を除く): 179292920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 201451, 402902, 805804, 1007255, 1611608, 2014510, 3223216, 4029020, 6446432, 8058040, 12892864, 16116080, 25785728, 32232160, 64464320, 128928640]

約数ペア:

[(1, 128928640), (2, 64464320), (4, 32232160), (5, 25785728), (8, 16116080), (10, 12892864), (16, 8058040), (20, 6446432), (32, 4029020), (40, 3223216), (64, 2014510), (80, 1611608), (128, 1007255), (160, 805804), (320, 402902), (640, 201451)]