12420440

素因数分解:

$2^3\times 5^1\times {\mathrm{310511}}^1$

素因数の和:310522

約数の個数: 16

約数和(自身を含む): 27946080

約数和(自身を除く): 15525640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 310511, 621022, 1242044, 1552555, 2484088, 3105110, 6210220, 12420440]

約数ペア:

[(1, 12420440), (2, 6210220), (4, 3105110), (5, 2484088), (8, 1552555), (10, 1242044), (20, 621022), (40, 310511)]