21109040

素因数分解:

$2^4\times 5^1\times {\mathrm{263863}}^1$

素因数の和:263876

約数の個数: 20

約数和(自身を含む): 49078704

約数和(自身を除く): 27969664

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263863, 527726, 1055452, 1319315, 2110904, 2638630, 4221808, 5277260, 10554520, 21109040]

約数ペア:

[(1, 21109040), (2, 10554520), (4, 5277260), (5, 4221808), (8, 2638630), (10, 2110904), (16, 1319315), (20, 1055452), (40, 527726), (80, 263863)]