28720000

素因数分解:

$2^7\times 5^4\times {\mathrm{359}}^1$

素因数の和:393

約数の個数: 80

約数和(自身を含む): 71695800

約数和(自身を除く): 42975800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 320, 359, 400, 500, 625, 640, 718, 800, 1000, 1250, 1436, 1600, 1795, 2000, 2500, 2872, 3200, 3590, 4000, 5000, 5744, 7180, 8000, 8975, 10000, 11488, 14360, 16000, 17950, 20000, 22976, 28720, 35900, 40000, 44875, 45952, 57440, 71800, 80000, 89750, 114880, 143600, 179500, 224375, 229760, 287200, 359000, 448750, 574400, 718000, 897500, 1148800, 1436000, 1795000, 2872000, 3590000, 5744000, 7180000, 14360000, 28720000]

約数ペア:

[(1, 28720000), (2, 14360000), (4, 7180000), (5, 5744000), (8, 3590000), (10, 2872000), (16, 1795000), (20, 1436000), (25, 1148800), (32, 897500), (40, 718000), (50, 574400), (64, 448750), (80, 359000), (100, 287200), (125, 229760), (128, 224375), (160, 179500), (200, 143600), (250, 114880), (320, 89750), (359, 80000), (400, 71800), (500, 57440), (625, 45952), (640, 44875), (718, 40000), (800, 35900), (1000, 28720), (1250, 22976), (1436, 20000), (1600, 17950), (1795, 16000), (2000, 14360), (2500, 11488), (2872, 10000), (3200, 8975), (3590, 8000), (4000, 7180), (5000, 5744)]