19960840

素因数分解:

$2^3\times 5^1\times {\mathrm{499021}}^1$

素因数の和:499032

約数の個数: 16

約数和(自身を含む): 44911980

約数和(自身を除く): 24951140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499021, 998042, 1996084, 2495105, 3992168, 4990210, 9980420, 19960840]

約数ペア:

[(1, 19960840), (2, 9980420), (4, 4990210), (5, 3992168), (8, 2495105), (10, 1996084), (20, 998042), (40, 499021)]