12800500

素因数分解:

$2^2\times 5^3\times {\mathrm{25601}}^1$

素因数の和:25620

約数の個数: 24

約数和(自身を含む): 27957384

約数和(自身を除く): 15156884

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500, 25601, 51202, 102404, 128005, 256010, 512020, 640025, 1280050, 2560100, 3200125, 6400250, 12800500]

約数ペア:

[(1, 12800500), (2, 6400250), (4, 3200125), (5, 2560100), (10, 1280050), (20, 640025), (25, 512020), (50, 256010), (100, 128005), (125, 102404), (250, 51202), (500, 25601)]