798400

素因数分解:

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

素因数の和:521

約数の個数: 42

約数和(自身を含む): 1968500

約数和(自身を除く): 1170100

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 160, 200, 320, 400, 499, 800, 998, 1600, 1996, 2495, 3992, 4990, 7984, 9980, 12475, 15968, 19960, 24950, 31936, 39920, 49900, 79840, 99800, 159680, 199600, 399200, 798400]

約数ペア:

[(1, 798400), (2, 399200), (4, 199600), (5, 159680), (8, 99800), (10, 79840), (16, 49900), (20, 39920), (25, 31936), (32, 24950), (40, 19960), (50, 15968), (64, 12475), (80, 9980), (100, 7984), (160, 4990), (200, 3992), (320, 2495), (400, 1996), (499, 1600), (800, 998)]