18750000

素因数分解:

$2^4\times 3^1\times 5^8$

素因数の和:51

約数の個数: 90

約数和(自身を含む): 60546844

約数和(自身を除く): 41796844

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 25, 30, 40, 48, 50, 60, 75, 80, 100, 120, 125, 150, 200, 240, 250, 300, 375, 400, 500, 600, 625, 750, 1000, 1200, 1250, 1500, 1875, 2000, 2500, 3000, 3125, 3750, 5000, 6000, 6250, 7500, 9375, 10000, 12500, 15000, 15625, 18750, 25000, 30000, 31250, 37500, 46875, 50000, 62500, 75000, 78125, 93750, 125000, 150000, 156250, 187500, 234375, 250000, 312500, 375000, 390625, 468750, 625000, 750000, 781250, 937500, 1171875, 1250000, 1562500, 1875000, 2343750, 3125000, 3750000, 4687500, 6250000, 9375000, 18750000]

約数ペア:

[(1, 18750000), (2, 9375000), (3, 6250000), (4, 4687500), (5, 3750000), (6, 3125000), (8, 2343750), (10, 1875000), (12, 1562500), (15, 1250000), (16, 1171875), (20, 937500), (24, 781250), (25, 750000), (30, 625000), (40, 468750), (48, 390625), (50, 375000), (60, 312500), (75, 250000), (80, 234375), (100, 187500), (120, 156250), (125, 150000), (150, 125000), (200, 93750), (240, 78125), (250, 75000), (300, 62500), (375, 50000), (400, 46875), (500, 37500), (600, 31250), (625, 30000), (750, 25000), (1000, 18750), (1200, 15625), (1250, 15000), (1500, 12500), (1875, 10000), (2000, 9375), (2500, 7500), (3000, 6250), (3125, 6000), (3750, 5000)]