19600000

素因数分解:

$2^7\times 5^5\times 7^2$

素因数の和:53

約数の個数: 144

約数和(自身を含む): 56773710

約数和(自身を除く): 37173710

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 32, 35, 40, 49, 50, 56, 64, 70, 80, 98, 100, 112, 125, 128, 140, 160, 175, 196, 200, 224, 245, 250, 280, 320, 350, 392, 400, 448, 490, 500, 560, 625, 640, 700, 784, 800, 875, 896, 980, 1000, 1120, 1225, 1250, 1400, 1568, 1600, 1750, 1960, 2000, 2240, 2450, 2500, 2800, 3125, 3136, 3200, 3500, 3920, 4000, 4375, 4480, 4900, 5000, 5600, 6125, 6250, 6272, 7000, 7840, 8000, 8750, 9800, 10000, 11200, 12250, 12500, 14000, 15680, 16000, 17500, 19600, 20000, 21875, 22400, 24500, 25000, 28000, 30625, 31360, 35000, 39200, 40000, 43750, 49000, 50000, 56000, 61250, 70000, 78400, 80000, 87500, 98000, 100000, 112000, 122500, 140000, 153125, 156800, 175000, 196000, 200000, 245000, 280000, 306250, 350000, 392000, 400000, 490000, 560000, 612500, 700000, 784000, 980000, 1225000, 1400000, 1960000, 2450000, 2800000, 3920000, 4900000, 9800000, 19600000]

約数ペア:

[(1, 19600000), (2, 9800000), (4, 4900000), (5, 3920000), (7, 2800000), (8, 2450000), (10, 1960000), (14, 1400000), (16, 1225000), (20, 980000), (25, 784000), (28, 700000), (32, 612500), (35, 560000), (40, 490000), (49, 400000), (50, 392000), (56, 350000), (64, 306250), (70, 280000), (80, 245000), (98, 200000), (100, 196000), (112, 175000), (125, 156800), (128, 153125), (140, 140000), (160, 122500), (175, 112000), (196, 100000), (200, 98000), (224, 87500), (245, 80000), (250, 78400), (280, 70000), (320, 61250), (350, 56000), (392, 50000), (400, 49000), (448, 43750), (490, 40000), (500, 39200), (560, 35000), (625, 31360), (640, 30625), (700, 28000), (784, 25000), (800, 24500), (875, 22400), (896, 21875), (980, 20000), (1000, 19600), (1120, 17500), (1225, 16000), (1250, 15680), (1400, 14000), (1568, 12500), (1600, 12250), (1750, 11200), (1960, 10000), (2000, 9800), (2240, 8750), (2450, 8000), (2500, 7840), (2800, 7000), (3125, 6272), (3136, 6250), (3200, 6125), (3500, 5600), (3920, 5000), (4000, 4900), (4375, 4480)]