20257960

素因数分解:

$2^3\times 5^1\times {\mathrm{506449}}^1$

素因数の和:506460

約数の個数: 16

約数和(自身を含む): 45580500

約数和(自身を除く): 25322540

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 506449, 1012898, 2025796, 2532245, 4051592, 5064490, 10128980, 20257960]

約数ペア:

[(1, 20257960), (2, 10128980), (4, 5064490), (5, 4051592), (8, 2532245), (10, 2025796), (20, 1012898), (40, 506449)]