19406360

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4451}}^1$

素因数の和:4571

約数の個数: 32

約数和(自身を含む): 44074800

約数和(自身を除く): 24668440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 4451, 8902, 17804, 22255, 35608, 44510, 89020, 178040, 485159, 970318, 1940636, 2425795, 3881272, 4851590, 9703180, 19406360]

約数ペア:

[(1, 19406360), (2, 9703180), (4, 4851590), (5, 3881272), (8, 2425795), (10, 1940636), (20, 970318), (40, 485159), (109, 178040), (218, 89020), (436, 44510), (545, 35608), (872, 22255), (1090, 17804), (2180, 8902), (4360, 4451)]