280000

素因数分解:

$2^6\times 5^4\times 7^1$

素因数の和:39

約数の個数: 70

約数和(自身を含む): 793496

約数和(自身を除く): 513496

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 32, 35, 40, 50, 56, 64, 70, 80, 100, 112, 125, 140, 160, 175, 200, 224, 250, 280, 320, 350, 400, 448, 500, 560, 625, 700, 800, 875, 1000, 1120, 1250, 1400, 1600, 1750, 2000, 2240, 2500, 2800, 3500, 4000, 4375, 5000, 5600, 7000, 8000, 8750, 10000, 11200, 14000, 17500, 20000, 28000, 35000, 40000, 56000, 70000, 140000, 280000]

約数ペア:

[(1, 280000), (2, 140000), (4, 70000), (5, 56000), (7, 40000), (8, 35000), (10, 28000), (14, 20000), (16, 17500), (20, 14000), (25, 11200), (28, 10000), (32, 8750), (35, 8000), (40, 7000), (50, 5600), (56, 5000), (64, 4375), (70, 4000), (80, 3500), (100, 2800), (112, 2500), (125, 2240), (140, 2000), (160, 1750), (175, 1600), (200, 1400), (224, 1250), (250, 1120), (280, 1000), (320, 875), (350, 800), (400, 700), (448, 625), (500, 560)]