21240460

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{25903}}^1$

素因数の和:25953

約数の個数: 24

約数和(自身を含む): 45694656

約数和(自身を除く): 24454196

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 25903, 51806, 103612, 129515, 259030, 518060, 1062023, 2124046, 4248092, 5310115, 10620230, 21240460]

約数ペア:

[(1, 21240460), (2, 10620230), (4, 5310115), (5, 4248092), (10, 2124046), (20, 1062023), (41, 518060), (82, 259030), (164, 129515), (205, 103612), (410, 51806), (820, 25903)]