20012000

素因数分解:

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

素因数の和:5028

約数の個数: 48

約数和(自身を含む): 49179312

約数和(自身を除く): 29167312

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 800, 1000, 2000, 4000, 5003, 10006, 20012, 25015, 40024, 50030, 80048, 100060, 125075, 160096, 200120, 250150, 400240, 500300, 625375, 800480, 1000600, 1250750, 2001200, 2501500, 4002400, 5003000, 10006000, 20012000]

約数ペア:

[(1, 20012000), (2, 10006000), (4, 5003000), (5, 4002400), (8, 2501500), (10, 2001200), (16, 1250750), (20, 1000600), (25, 800480), (32, 625375), (40, 500300), (50, 400240), (80, 250150), (100, 200120), (125, 160096), (160, 125075), (200, 100060), (250, 80048), (400, 50030), (500, 40024), (800, 25015), (1000, 20012), (2000, 10006), (4000, 5003)]