18800920

素因数分解:

$2^3\times 5^1\times {\mathrm{443}}^1\times {\mathrm{1061}}^1$

素因数の和:1515

約数の個数: 32

約数和(自身を含む): 42437520

約数和(自身を除く): 23636600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 443, 886, 1061, 1772, 2122, 2215, 3544, 4244, 4430, 5305, 8488, 8860, 10610, 17720, 21220, 42440, 470023, 940046, 1880092, 2350115, 3760184, 4700230, 9400460, 18800920]

約数ペア:

[(1, 18800920), (2, 9400460), (4, 4700230), (5, 3760184), (8, 2350115), (10, 1880092), (20, 940046), (40, 470023), (443, 42440), (886, 21220), (1061, 17720), (1772, 10610), (2122, 8860), (2215, 8488), (3544, 5305), (4244, 4430)]