19991540

素因数分解:

$2^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{5023}}^1$

素因数の和:5231

約数の個数: 24

約数和(自身を含む): 42201600

約数和(自身を除く): 22210060

約数列:

[1, 2, 4, 5, 10, 20, 199, 398, 796, 995, 1990, 3980, 5023, 10046, 20092, 25115, 50230, 100460, 999577, 1999154, 3998308, 4997885, 9995770, 19991540]

約数ペア:

[(1, 19991540), (2, 9995770), (4, 4997885), (5, 3998308), (10, 1999154), (20, 999577), (199, 100460), (398, 50230), (796, 25115), (995, 20092), (1990, 10046), (3980, 5023)]