20514520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{39451}}^1$

素因数の和:39475

約数の個数: 32

約数和(自身を含む): 49709520

約数和(自身を除く): 29195000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 39451, 78902, 157804, 197255, 315608, 394510, 512863, 789020, 1025726, 1578040, 2051452, 2564315, 4102904, 5128630, 10257260, 20514520]

約数ペア:

[(1, 20514520), (2, 10257260), (4, 5128630), (5, 4102904), (8, 2564315), (10, 2051452), (13, 1578040), (20, 1025726), (26, 789020), (40, 512863), (52, 394510), (65, 315608), (104, 197255), (130, 157804), (260, 78902), (520, 39451)]