19960000

素因数分解:

$2^6\times 5^4\times {\mathrm{499}}^1$

素因数の和:531

約数の個数: 70

約数和(自身を含む): 49593500

約数和(自身を除く): 29633500

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 160, 200, 250, 320, 400, 499, 500, 625, 800, 998, 1000, 1250, 1600, 1996, 2000, 2495, 2500, 3992, 4000, 4990, 5000, 7984, 8000, 9980, 10000, 12475, 15968, 19960, 20000, 24950, 31936, 39920, 40000, 49900, 62375, 79840, 99800, 124750, 159680, 199600, 249500, 311875, 399200, 499000, 623750, 798400, 998000, 1247500, 1996000, 2495000, 3992000, 4990000, 9980000, 19960000]

約数ペア:

[(1, 19960000), (2, 9980000), (4, 4990000), (5, 3992000), (8, 2495000), (10, 1996000), (16, 1247500), (20, 998000), (25, 798400), (32, 623750), (40, 499000), (50, 399200), (64, 311875), (80, 249500), (100, 199600), (125, 159680), (160, 124750), (200, 99800), (250, 79840), (320, 62375), (400, 49900), (499, 40000), (500, 39920), (625, 31936), (800, 24950), (998, 20000), (1000, 19960), (1250, 15968), (1600, 12475), (1996, 10000), (2000, 9980), (2495, 8000), (2500, 7984), (3992, 5000), (4000, 4990)]