19904120

素因数分解:

$2^3\times 5^1\times {\mathrm{497603}}^1$

素因数の和:497614

約数の個数: 16

約数和(自身を含む): 44784360

約数和(自身を除く): 24880240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 497603, 995206, 1990412, 2488015, 3980824, 4976030, 9952060, 19904120]

約数ペア:

[(1, 19904120), (2, 9952060), (4, 4976030), (5, 3980824), (8, 2488015), (10, 1990412), (20, 995206), (40, 497603)]