1640808640

素因数分解:

$2^6\times 5^1\times {\mathrm{5127527}}^1$

素因数の和:5127544

約数の個数: 28

約数和(自身を含む): 3907176336

約数和(自身を除く): 2266367696

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 5127527, 10255054, 20510108, 25637635, 41020216, 51275270, 82040432, 102550540, 164080864, 205101080, 328161728, 410202160, 820404320, 1640808640]

約数ペア:

[(1, 1640808640), (2, 820404320), (4, 410202160), (5, 328161728), (8, 205101080), (10, 164080864), (16, 102550540), (20, 82040432), (32, 51275270), (40, 41020216), (64, 25637635), (80, 20510108), (160, 10255054), (320, 5127527)]