13440640

素因数分解:

$2^7\times 5^1\times {\mathrm{21001}}^1$

素因数の和:21020

約数の個数: 32

約数和(自身を含む): 32133060

約数和(自身を除く): 18692420

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 21001, 42002, 84004, 105005, 168008, 210010, 336016, 420020, 672032, 840040, 1344064, 1680080, 2688128, 3360160, 6720320, 13440640]

約数ペア:

[(1, 13440640), (2, 6720320), (4, 3360160), (5, 2688128), (8, 1680080), (10, 1344064), (16, 840040), (20, 672032), (32, 420020), (40, 336016), (64, 210010), (80, 168008), (128, 105005), (160, 84004), (320, 42002), (640, 21001)]