81528640

素因数分解:

$2^6\times 5^1\times {\mathrm{254777}}^1$

素因数の和:254794

約数の個数: 28

約数和(自身を含む): 194140836

約数和(自身を除く): 112612196

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 254777, 509554, 1019108, 1273885, 2038216, 2547770, 4076432, 5095540, 8152864, 10191080, 16305728, 20382160, 40764320, 81528640]

約数ペア:

[(1, 81528640), (2, 40764320), (4, 20382160), (5, 16305728), (8, 10191080), (10, 8152864), (16, 5095540), (20, 4076432), (32, 2547770), (40, 2038216), (64, 1273885), (80, 1019108), (160, 509554), (320, 254777)]