12640400

素因数分解:

$2^4\times 5^2\times {\mathrm{31601}}^1$

素因数の和:31619

約数の個数: 30

約数和(自身を含む): 30369522

約数和(自身を除く): 17729122

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 31601, 63202, 126404, 158005, 252808, 316010, 505616, 632020, 790025, 1264040, 1580050, 2528080, 3160100, 6320200, 12640400]

約数ペア:

[(1, 12640400), (2, 6320200), (4, 3160100), (5, 2528080), (8, 1580050), (10, 1264040), (16, 790025), (20, 632020), (25, 505616), (40, 316010), (50, 252808), (80, 158005), (100, 126404), (200, 63202), (400, 31601)]