2560640

素因数分解:

$2^7\times 5^1\times {\mathrm{4001}}^1$

素因数の和:4020

約数の個数: 32

約数和(自身を含む): 6123060

約数和(自身を除く): 3562420

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 4001, 8002, 16004, 20005, 32008, 40010, 64016, 80020, 128032, 160040, 256064, 320080, 512128, 640160, 1280320, 2560640]

約数ペア:

[(1, 2560640), (2, 1280320), (4, 640160), (5, 512128), (8, 320080), (10, 256064), (16, 160040), (20, 128032), (32, 80020), (40, 64016), (64, 40010), (80, 32008), (128, 20005), (160, 16004), (320, 8002), (640, 4001)]