18000000

素因数分解:

$2^7\times 3^2\times 5^6$

素因数の和:50

約数の個数: 168

約数和(自身を含む): 64745265

約数和(自身を除く): 46745265

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, 64, 72, 75, 80, 90, 96, 100, 120, 125, 128, 144, 150, 160, 180, 192, 200, 225, 240, 250, 288, 300, 320, 360, 375, 384, 400, 450, 480, 500, 576, 600, 625, 640, 720, 750, 800, 900, 960, 1000, 1125, 1152, 1200, 1250, 1440, 1500, 1600, 1800, 1875, 1920, 2000, 2250, 2400, 2500, 2880, 3000, 3125, 3200, 3600, 3750, 4000, 4500, 4800, 5000, 5625, 5760, 6000, 6250, 7200, 7500, 8000, 9000, 9375, 9600, 10000, 11250, 12000, 12500, 14400, 15000, 15625, 16000, 18000, 18750, 20000, 22500, 24000, 25000, 28125, 28800, 30000, 31250, 36000, 37500, 40000, 45000, 46875, 48000, 50000, 56250, 60000, 62500, 72000, 75000, 80000, 90000, 93750, 100000, 112500, 120000, 125000, 140625, 144000, 150000, 180000, 187500, 200000, 225000, 240000, 250000, 281250, 300000, 360000, 375000, 400000, 450000, 500000, 562500, 600000, 720000, 750000, 900000, 1000000, 1125000, 1200000, 1500000, 1800000, 2000000, 2250000, 3000000, 3600000, 4500000, 6000000, 9000000, 18000000]

約数ペア:

[(1, 18000000), (2, 9000000), (3, 6000000), (4, 4500000), (5, 3600000), (6, 3000000), (8, 2250000), (9, 2000000), (10, 1800000), (12, 1500000), (15, 1200000), (16, 1125000), (18, 1000000), (20, 900000), (24, 750000), (25, 720000), (30, 600000), (32, 562500), (36, 500000), (40, 450000), (45, 400000), (48, 375000), (50, 360000), (60, 300000), (64, 281250), (72, 250000), (75, 240000), (80, 225000), (90, 200000), (96, 187500), (100, 180000), (120, 150000), (125, 144000), (128, 140625), (144, 125000), (150, 120000), (160, 112500), (180, 100000), (192, 93750), (200, 90000), (225, 80000), (240, 75000), (250, 72000), (288, 62500), (300, 60000), (320, 56250), (360, 50000), (375, 48000), (384, 46875), (400, 45000), (450, 40000), (480, 37500), (500, 36000), (576, 31250), (600, 30000), (625, 28800), (640, 28125), (720, 25000), (750, 24000), (800, 22500), (900, 20000), (960, 18750), (1000, 18000), (1125, 16000), (1152, 15625), (1200, 15000), (1250, 14400), (1440, 12500), (1500, 12000), (1600, 11250), (1800, 10000), (1875, 9600), (1920, 9375), (2000, 9000), (2250, 8000), (2400, 7500), (2500, 7200), (2880, 6250), (3000, 6000), (3125, 5760), (3200, 5625), (3600, 5000), (3750, 4800), (4000, 4500)]