180000

素因数分解:

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

素因数の和:36

約数の個数: 90

約数和(自身を含む): 639639

約数和(自身を除く): 459639

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 25, 30, 32, 36, 40, 45, 48, 50, 60, 72, 75, 80, 90, 96, 100, 120, 125, 144, 150, 160, 180, 200, 225, 240, 250, 288, 300, 360, 375, 400, 450, 480, 500, 600, 625, 720, 750, 800, 900, 1000, 1125, 1200, 1250, 1440, 1500, 1800, 1875, 2000, 2250, 2400, 2500, 3000, 3600, 3750, 4000, 4500, 5000, 5625, 6000, 7200, 7500, 9000, 10000, 11250, 12000, 15000, 18000, 20000, 22500, 30000, 36000, 45000, 60000, 90000, 180000]

約数ペア:

[(1, 180000), (2, 90000), (3, 60000), (4, 45000), (5, 36000), (6, 30000), (8, 22500), (9, 20000), (10, 18000), (12, 15000), (15, 12000), (16, 11250), (18, 10000), (20, 9000), (24, 7500), (25, 7200), (30, 6000), (32, 5625), (36, 5000), (40, 4500), (45, 4000), (48, 3750), (50, 3600), (60, 3000), (72, 2500), (75, 2400), (80, 2250), (90, 2000), (96, 1875), (100, 1800), (120, 1500), (125, 1440), (144, 1250), (150, 1200), (160, 1125), (180, 1000), (200, 900), (225, 800), (240, 750), (250, 720), (288, 625), (300, 600), (360, 500), (375, 480), (400, 450)]