19640120

素因数分解:

$2^3\times 5^1\times {\mathrm{491003}}^1$

素因数の和:491014

約数の個数: 16

約数和(自身を含む): 44190360

約数和(自身を除く): 24550240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 491003, 982006, 1964012, 2455015, 3928024, 4910030, 9820060, 19640120]

約数ペア:

[(1, 19640120), (2, 9820060), (4, 4910030), (5, 3928024), (8, 2455015), (10, 1964012), (20, 982006), (40, 491003)]