20495360

素因数分解:

$2^{10}\times 5^1\times {\mathrm{4003}}^1$

素因数の和:4028

約数の個数: 44

約数和(自身を含む): 49177128

約数和(自身を除く): 28681768

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 2560, 4003, 5120, 8006, 16012, 20015, 32024, 40030, 64048, 80060, 128096, 160120, 256192, 320240, 512384, 640480, 1024768, 1280960, 2049536, 2561920, 4099072, 5123840, 10247680, 20495360]

約数ペア:

[(1, 20495360), (2, 10247680), (4, 5123840), (5, 4099072), (8, 2561920), (10, 2049536), (16, 1280960), (20, 1024768), (32, 640480), (40, 512384), (64, 320240), (80, 256192), (128, 160120), (160, 128096), (256, 80060), (320, 64048), (512, 40030), (640, 32024), (1024, 20015), (1280, 16012), (2560, 8006), (4003, 5120)]