20509520

素因数分解:

$2^4\times 5^1\times {\mathrm{256369}}^1$

素因数の和:256382

約数の個数: 20

約数和(自身を含む): 47684820

約数和(自身を除く): 27175300

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 256369, 512738, 1025476, 1281845, 2050952, 2563690, 4101904, 5127380, 10254760, 20509520]

約数ペア:

[(1, 20509520), (2, 10254760), (4, 5127380), (5, 4101904), (8, 2563690), (10, 2050952), (16, 1281845), (20, 1025476), (40, 512738), (80, 256369)]