7840000

素因数分解:

$2^8\times 5^4\times 7^2$

素因数の和:50

約数の個数: 135

約数和(自身を含む): 22748187

約数和(自身を除く): 14908187

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, 256, 280, 320, 350, 392, 400, 448, 490, 500, 560, 625, 640, 700, 784, 800, 875, 896, 980, 1000, 1120, 1225, 1250, 1280, 1400, 1568, 1600, 1750, 1792, 1960, 2000, 2240, 2450, 2500, 2800, 3136, 3200, 3500, 3920, 4000, 4375, 4480, 4900, 5000, 5600, 6125, 6272, 6400, 7000, 7840, 8000, 8750, 8960, 9800, 10000, 11200, 12250, 12544, 14000, 15680, 16000, 17500, 19600, 20000, 22400, 24500, 28000, 30625, 31360, 32000, 35000, 39200, 40000, 44800, 49000, 56000, 61250, 62720, 70000, 78400, 80000, 98000, 112000, 122500, 140000, 156800, 160000, 196000, 224000, 245000, 280000, 313600, 392000, 490000, 560000, 784000, 980000, 1120000, 1568000, 1960000, 3920000, 7840000]

約数ペア:

[(1, 7840000), (2, 3920000), (4, 1960000), (5, 1568000), (7, 1120000), (8, 980000), (10, 784000), (14, 560000), (16, 490000), (20, 392000), (25, 313600), (28, 280000), (32, 245000), (35, 224000), (40, 196000), (49, 160000), (50, 156800), (56, 140000), (64, 122500), (70, 112000), (80, 98000), (98, 80000), (100, 78400), (112, 70000), (125, 62720), (128, 61250), (140, 56000), (160, 49000), (175, 44800), (196, 40000), (200, 39200), (224, 35000), (245, 32000), (250, 31360), (256, 30625), (280, 28000), (320, 24500), (350, 22400), (392, 20000), (400, 19600), (448, 17500), (490, 16000), (500, 15680), (560, 14000), (625, 12544), (640, 12250), (700, 11200), (784, 10000), (800, 9800), (875, 8960), (896, 8750), (980, 8000), (1000, 7840), (1120, 7000), (1225, 6400), (1250, 6272), (1280, 6125), (1400, 5600), (1568, 5000), (1600, 4900), (1750, 4480), (1792, 4375), (1960, 4000), (2000, 3920), (2240, 3500), (2450, 3200), (2500, 3136)]