20408860

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{12917}}^1$

素因数の和:13005

約数の個数: 24

約数和(自身を含む): 43404480

約数和(自身を除く): 22995620

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 12917, 25834, 51668, 64585, 129170, 258340, 1020443, 2040886, 4081772, 5102215, 10204430, 20408860]

約数ペア:

[(1, 20408860), (2, 10204430), (4, 5102215), (5, 4081772), (10, 2040886), (20, 1020443), (79, 258340), (158, 129170), (316, 64585), (395, 51668), (790, 25834), (1580, 12917)]