28240000

素因数分解:

$2^7\times 5^4\times {\mathrm{353}}^1$

素因数の和:387

約数の個数: 80

約数和(自身を含む): 70500870

約数和(自身を除く): 42260870

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 320, 353, 400, 500, 625, 640, 706, 800, 1000, 1250, 1412, 1600, 1765, 2000, 2500, 2824, 3200, 3530, 4000, 5000, 5648, 7060, 8000, 8825, 10000, 11296, 14120, 16000, 17650, 20000, 22592, 28240, 35300, 40000, 44125, 45184, 56480, 70600, 80000, 88250, 112960, 141200, 176500, 220625, 225920, 282400, 353000, 441250, 564800, 706000, 882500, 1129600, 1412000, 1765000, 2824000, 3530000, 5648000, 7060000, 14120000, 28240000]

約数ペア:

[(1, 28240000), (2, 14120000), (4, 7060000), (5, 5648000), (8, 3530000), (10, 2824000), (16, 1765000), (20, 1412000), (25, 1129600), (32, 882500), (40, 706000), (50, 564800), (64, 441250), (80, 353000), (100, 282400), (125, 225920), (128, 220625), (160, 176500), (200, 141200), (250, 112960), (320, 88250), (353, 80000), (400, 70600), (500, 56480), (625, 45184), (640, 44125), (706, 40000), (800, 35300), (1000, 28240), (1250, 22592), (1412, 20000), (1600, 17650), (1765, 16000), (2000, 14120), (2500, 11296), (2824, 10000), (3200, 8825), (3530, 8000), (4000, 7060), (5000, 5648)]