850000

素因数分解:

$2^4\times 5^5\times {\mathrm{17}}^1$

素因数の和:50

約数の個数: 60

約数和(自身を含む): 2179548

約数和(自身を除く): 1329548

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 25, 34, 40, 50, 68, 80, 85, 100, 125, 136, 170, 200, 250, 272, 340, 400, 425, 500, 625, 680, 850, 1000, 1250, 1360, 1700, 2000, 2125, 2500, 3125, 3400, 4250, 5000, 6250, 6800, 8500, 10000, 10625, 12500, 17000, 21250, 25000, 34000, 42500, 50000, 53125, 85000, 106250, 170000, 212500, 425000, 850000]

約数ペア:

[(1, 850000), (2, 425000), (4, 212500), (5, 170000), (8, 106250), (10, 85000), (16, 53125), (17, 50000), (20, 42500), (25, 34000), (34, 25000), (40, 21250), (50, 17000), (68, 12500), (80, 10625), (85, 10000), (100, 8500), (125, 6800), (136, 6250), (170, 5000), (200, 4250), (250, 3400), (272, 3125), (340, 2500), (400, 2125), (425, 2000), (500, 1700), (625, 1360), (680, 1250), (850, 1000)]