4975000

素因数分解:

$2^3\times 5^5\times {\mathrm{199}}^1$

素因数の和:230

約数の個数: 48

約数和(自身を含む): 11718000

約数和(自身を除く): 6743000

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 199, 200, 250, 398, 500, 625, 796, 995, 1000, 1250, 1592, 1990, 2500, 3125, 3980, 4975, 5000, 6250, 7960, 9950, 12500, 19900, 24875, 25000, 39800, 49750, 99500, 124375, 199000, 248750, 497500, 621875, 995000, 1243750, 2487500, 4975000]

約数ペア:

[(1, 4975000), (2, 2487500), (4, 1243750), (5, 995000), (8, 621875), (10, 497500), (20, 248750), (25, 199000), (40, 124375), (50, 99500), (100, 49750), (125, 39800), (199, 25000), (200, 24875), (250, 19900), (398, 12500), (500, 9950), (625, 7960), (796, 6250), (995, 5000), (1000, 4975), (1250, 3980), (1592, 3125), (1990, 2500)]