129448640

素因数分解:

$2^6\times 5^1\times {\mathrm{404527}}^1$

素因数の和:404544

約数の個数: 28

約数和(自身を含む): 308250336

約数和(自身を除く): 178801696

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 404527, 809054, 1618108, 2022635, 3236216, 4045270, 6472432, 8090540, 12944864, 16181080, 25889728, 32362160, 64724320, 129448640]

約数ペア:

[(1, 129448640), (2, 64724320), (4, 32362160), (5, 25889728), (8, 16181080), (10, 12944864), (16, 8090540), (20, 6472432), (32, 4045270), (40, 3236216), (64, 2022635), (80, 1618108), (160, 809054), (320, 404527)]