20018000

素因数分解:

$2^4\times 5^3\times {\mathrm{10009}}^1$

素因数の和:10032

約数の個数: 40

約数和(自身を含む): 48408360

約数和(自身を除く): 28390360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000, 10009, 20018, 40036, 50045, 80072, 100090, 160144, 200180, 250225, 400360, 500450, 800720, 1000900, 1251125, 2001800, 2502250, 4003600, 5004500, 10009000, 20018000]

約数ペア:

[(1, 20018000), (2, 10009000), (4, 5004500), (5, 4003600), (8, 2502250), (10, 2001800), (16, 1251125), (20, 1000900), (25, 800720), (40, 500450), (50, 400360), (80, 250225), (100, 200180), (125, 160144), (200, 100090), (250, 80072), (400, 50045), (500, 40036), (1000, 20018), (2000, 10009)]