450000

素因数分解:

$2^4\times 3^2\times 5^5$

素因数の和:39

約数の個数: 90

約数和(自身を含む): 1574118

約数和(自身を除く): 1124118

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 25, 30, 36, 40, 45, 48, 50, 60, 72, 75, 80, 90, 100, 120, 125, 144, 150, 180, 200, 225, 240, 250, 300, 360, 375, 400, 450, 500, 600, 625, 720, 750, 900, 1000, 1125, 1200, 1250, 1500, 1800, 1875, 2000, 2250, 2500, 3000, 3125, 3600, 3750, 4500, 5000, 5625, 6000, 6250, 7500, 9000, 9375, 10000, 11250, 12500, 15000, 18000, 18750, 22500, 25000, 28125, 30000, 37500, 45000, 50000, 56250, 75000, 90000, 112500, 150000, 225000, 450000]

約数ペア:

[(1, 450000), (2, 225000), (3, 150000), (4, 112500), (5, 90000), (6, 75000), (8, 56250), (9, 50000), (10, 45000), (12, 37500), (15, 30000), (16, 28125), (18, 25000), (20, 22500), (24, 18750), (25, 18000), (30, 15000), (36, 12500), (40, 11250), (45, 10000), (48, 9375), (50, 9000), (60, 7500), (72, 6250), (75, 6000), (80, 5625), (90, 5000), (100, 4500), (120, 3750), (125, 3600), (144, 3125), (150, 3000), (180, 2500), (200, 2250), (225, 2000), (240, 1875), (250, 1800), (300, 1500), (360, 1250), (375, 1200), (400, 1125), (450, 1000), (500, 900), (600, 750), (625, 720)]