20514800

素因数分解:

$2^4\times 5^2\times {\mathrm{51287}}^1$

素因数の和:51305

約数の個数: 30

約数和(自身を含む): 49287768

約数和(自身を除く): 28772968

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 51287, 102574, 205148, 256435, 410296, 512870, 820592, 1025740, 1282175, 2051480, 2564350, 4102960, 5128700, 10257400, 20514800]

約数ペア:

[(1, 20514800), (2, 10257400), (4, 5128700), (5, 4102960), (8, 2564350), (10, 2051480), (16, 1282175), (20, 1025740), (25, 820592), (40, 512870), (50, 410296), (80, 256435), (100, 205148), (200, 102574), (400, 51287)]