20728000

素因数分解:

$2^6\times 5^3\times {\mathrm{2591}}^1$

素因数の和:2618

約数の個数: 56

約数和(自身を含む): 51352704

約数和(自身を除く): 30624704

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 160, 200, 250, 320, 400, 500, 800, 1000, 1600, 2000, 2591, 4000, 5182, 8000, 10364, 12955, 20728, 25910, 41456, 51820, 64775, 82912, 103640, 129550, 165824, 207280, 259100, 323875, 414560, 518200, 647750, 829120, 1036400, 1295500, 2072800, 2591000, 4145600, 5182000, 10364000, 20728000]

約数ペア:

[(1, 20728000), (2, 10364000), (4, 5182000), (5, 4145600), (8, 2591000), (10, 2072800), (16, 1295500), (20, 1036400), (25, 829120), (32, 647750), (40, 518200), (50, 414560), (64, 323875), (80, 259100), (100, 207280), (125, 165824), (160, 129550), (200, 103640), (250, 82912), (320, 64775), (400, 51820), (500, 41456), (800, 25910), (1000, 20728), (1600, 12955), (2000, 10364), (2591, 8000), (4000, 5182)]