128080000

素因数分解:

$2^7\times 5^4\times {\mathrm{1601}}^1$

素因数の和:1635

約数の個数: 80

約数和(自身を含む): 319046310

約数和(自身を除く): 190966310

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 320, 400, 500, 625, 640, 800, 1000, 1250, 1600, 1601, 2000, 2500, 3200, 3202, 4000, 5000, 6404, 8000, 8005, 10000, 12808, 16000, 16010, 20000, 25616, 32020, 40000, 40025, 51232, 64040, 80000, 80050, 102464, 128080, 160100, 200125, 204928, 256160, 320200, 400250, 512320, 640400, 800500, 1000625, 1024640, 1280800, 1601000, 2001250, 2561600, 3202000, 4002500, 5123200, 6404000, 8005000, 12808000, 16010000, 25616000, 32020000, 64040000, 128080000]

約数ペア:

[(1, 128080000), (2, 64040000), (4, 32020000), (5, 25616000), (8, 16010000), (10, 12808000), (16, 8005000), (20, 6404000), (25, 5123200), (32, 4002500), (40, 3202000), (50, 2561600), (64, 2001250), (80, 1601000), (100, 1280800), (125, 1024640), (128, 1000625), (160, 800500), (200, 640400), (250, 512320), (320, 400250), (400, 320200), (500, 256160), (625, 204928), (640, 200125), (800, 160100), (1000, 128080), (1250, 102464), (1600, 80050), (1601, 80000), (2000, 64040), (2500, 51232), (3200, 40025), (3202, 40000), (4000, 32020), (5000, 25616), (6404, 20000), (8000, 16010), (8005, 16000), (10000, 12808)]