318400

素因数分解:

$2^6\times 5^2\times {\mathrm{199}}^1$

素因数の和:221

約数の個数: 42

約数和(自身を含む): 787400

約数和(自身を除く): 469000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 160, 199, 200, 320, 398, 400, 796, 800, 995, 1592, 1600, 1990, 3184, 3980, 4975, 6368, 7960, 9950, 12736, 15920, 19900, 31840, 39800, 63680, 79600, 159200, 318400]

約数ペア:

[(1, 318400), (2, 159200), (4, 79600), (5, 63680), (8, 39800), (10, 31840), (16, 19900), (20, 15920), (25, 12736), (32, 9950), (40, 7960), (50, 6368), (64, 4975), (80, 3980), (100, 3184), (160, 1990), (199, 1600), (200, 1592), (320, 995), (398, 800), (400, 796)]