19903880

素因数分解:

$2^3\times 5^1\times {\mathrm{497597}}^1$

素因数の和:497608

約数の個数: 16

約数和(自身を含む): 44783820

約数和(自身を除く): 24879940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 497597, 995194, 1990388, 2487985, 3980776, 4975970, 9951940, 19903880]

約数ペア:

[(1, 19903880), (2, 9951940), (4, 4975970), (5, 3980776), (8, 2487985), (10, 1990388), (20, 995194), (40, 497597)]