399200

素因数分解:

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

素因数の和:519

約数の個数: 36

約数和(自身を含む): 976500

約数和(自身を除く): 577300

約数列:

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

約数ペア:

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