20656880

素因数分解:

$2^4\times 5^1\times {\mathrm{258211}}^1$

素因数の和:258224

約数の個数: 20

約数和(自身を含む): 48027432

約数和(自身を除く): 27370552

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 258211, 516422, 1032844, 1291055, 2065688, 2582110, 4131376, 5164220, 10328440, 20656880]

約数ペア:

[(1, 20656880), (2, 10328440), (4, 5164220), (5, 4131376), (8, 2582110), (10, 2065688), (16, 1291055), (20, 1032844), (40, 516422), (80, 258211)]