21378460

素因数分解:

$2^2\times 5^1\times {\mathrm{457}}^1\times {\mathrm{2339}}^1$

素因数の和:2805

約数の個数: 24

約数和(自身を含む): 45012240

約数和(自身を除く): 23633780

約数列:

[1, 2, 4, 5, 10, 20, 457, 914, 1828, 2285, 2339, 4570, 4678, 9140, 9356, 11695, 23390, 46780, 1068923, 2137846, 4275692, 5344615, 10689230, 21378460]

約数ペア:

[(1, 21378460), (2, 10689230), (4, 5344615), (5, 4275692), (10, 2137846), (20, 1068923), (457, 46780), (914, 23390), (1828, 11695), (2285, 9356), (2339, 9140), (4570, 4678)]