78400000

素因数分解:

$2^9\times 5^5\times 7^2$

素因数の和:57

約数の個数: 180

約数和(自身を含む): 227762766

約数和(自身を除く): 149362766

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, 512, 560, 625, 640, 700, 784, 800, 875, 896, 980, 1000, 1120, 1225, 1250, 1280, 1400, 1568, 1600, 1750, 1792, 1960, 2000, 2240, 2450, 2500, 2560, 2800, 3125, 3136, 3200, 3500, 3584, 3920, 4000, 4375, 4480, 4900, 5000, 5600, 6125, 6250, 6272, 6400, 7000, 7840, 8000, 8750, 8960, 9800, 10000, 11200, 12250, 12500, 12544, 12800, 14000, 15680, 16000, 17500, 17920, 19600, 20000, 21875, 22400, 24500, 25000, 25088, 28000, 30625, 31360, 32000, 35000, 39200, 40000, 43750, 44800, 49000, 50000, 56000, 61250, 62720, 64000, 70000, 78400, 80000, 87500, 89600, 98000, 100000, 112000, 122500, 125440, 140000, 153125, 156800, 160000, 175000, 196000, 200000, 224000, 245000, 280000, 306250, 313600, 320000, 350000, 392000, 400000, 448000, 490000, 560000, 612500, 627200, 700000, 784000, 800000, 980000, 1120000, 1225000, 1400000, 1568000, 1600000, 1960000, 2240000, 2450000, 2800000, 3136000, 3920000, 4900000, 5600000, 7840000, 9800000, 11200000, 15680000, 19600000, 39200000, 78400000]

約数ペア:

[(1, 78400000), (2, 39200000), (4, 19600000), (5, 15680000), (7, 11200000), (8, 9800000), (10, 7840000), (14, 5600000), (16, 4900000), (20, 3920000), (25, 3136000), (28, 2800000), (32, 2450000), (35, 2240000), (40, 1960000), (49, 1600000), (50, 1568000), (56, 1400000), (64, 1225000), (70, 1120000), (80, 980000), (98, 800000), (100, 784000), (112, 700000), (125, 627200), (128, 612500), (140, 560000), (160, 490000), (175, 448000), (196, 400000), (200, 392000), (224, 350000), (245, 320000), (250, 313600), (256, 306250), (280, 280000), (320, 245000), (350, 224000), (392, 200000), (400, 196000), (448, 175000), (490, 160000), (500, 156800), (512, 153125), (560, 140000), (625, 125440), (640, 122500), (700, 112000), (784, 100000), (800, 98000), (875, 89600), (896, 87500), (980, 80000), (1000, 78400), (1120, 70000), (1225, 64000), (1250, 62720), (1280, 61250), (1400, 56000), (1568, 50000), (1600, 49000), (1750, 44800), (1792, 43750), (1960, 40000), (2000, 39200), (2240, 35000), (2450, 32000), (2500, 31360), (2560, 30625), (2800, 28000), (3125, 25088), (3136, 25000), (3200, 24500), (3500, 22400), (3584, 21875), (3920, 20000), (4000, 19600), (4375, 17920), (4480, 17500), (4900, 16000), (5000, 15680), (5600, 14000), (6125, 12800), (6250, 12544), (6272, 12500), (6400, 12250), (7000, 11200), (7840, 10000), (8000, 9800), (8750, 8960)]