20492800

素因数分解:

$2^9\times 5^2\times {\mathrm{1601}}^1$

素因数の和:1629

約数の個数: 60

約数和(自身を含む): 50804226

約数和(自身を除く): 30311426

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 256, 320, 400, 512, 640, 800, 1280, 1600, 1601, 2560, 3200, 3202, 6400, 6404, 8005, 12800, 12808, 16010, 25616, 32020, 40025, 51232, 64040, 80050, 102464, 128080, 160100, 204928, 256160, 320200, 409856, 512320, 640400, 819712, 1024640, 1280800, 2049280, 2561600, 4098560, 5123200, 10246400, 20492800]

約数ペア:

[(1, 20492800), (2, 10246400), (4, 5123200), (5, 4098560), (8, 2561600), (10, 2049280), (16, 1280800), (20, 1024640), (25, 819712), (32, 640400), (40, 512320), (50, 409856), (64, 320200), (80, 256160), (100, 204928), (128, 160100), (160, 128080), (200, 102464), (256, 80050), (320, 64040), (400, 51232), (512, 40025), (640, 32020), (800, 25616), (1280, 16010), (1600, 12808), (1601, 12800), (2560, 8005), (3200, 6404), (3202, 6400)]