19721960

素因数分解:

$2^3\times 5^1\times {\mathrm{493049}}^1$

素因数の和:493060

約数の個数: 16

約数和(自身を含む): 44374500

約数和(自身を除く): 24652540

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 493049, 986098, 1972196, 2465245, 3944392, 4930490, 9860980, 19721960]

約数ペア:

[(1, 19721960), (2, 9860980), (4, 4930490), (5, 3944392), (8, 2465245), (10, 1972196), (20, 986098), (40, 493049)]