20454800

素因数分解:

$2^4\times 5^2\times {\mathrm{51137}}^1$

素因数の和:51155

約数の個数: 30

約数和(自身を含む): 49143618

約数和(自身を除く): 28688818

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 51137, 102274, 204548, 255685, 409096, 511370, 818192, 1022740, 1278425, 2045480, 2556850, 4090960, 5113700, 10227400, 20454800]

約数ペア:

[(1, 20454800), (2, 10227400), (4, 5113700), (5, 4090960), (8, 2556850), (10, 2045480), (16, 1278425), (20, 1022740), (25, 818192), (40, 511370), (50, 409096), (80, 255685), (100, 204548), (200, 102274), (400, 51137)]