21813080

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{5003}}^1$

素因数の和:5123

約数の個数: 32

約数和(自身を含む): 49539600

約数和(自身を除く): 27726520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 5003, 10006, 20012, 25015, 40024, 50030, 100060, 200120, 545327, 1090654, 2181308, 2726635, 4362616, 5453270, 10906540, 21813080]

約数ペア:

[(1, 21813080), (2, 10906540), (4, 5453270), (5, 4362616), (8, 2726635), (10, 2181308), (20, 1090654), (40, 545327), (109, 200120), (218, 100060), (436, 50030), (545, 40024), (872, 25015), (1090, 20012), (2180, 10006), (4360, 5003)]