81363280

素因数分解:

$2^4\times 5^1\times {\mathrm{1017041}}^1$

素因数の和:1017054

約数の個数: 20

約数和(自身を含む): 189169812

約数和(自身を除く): 107806532

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1017041, 2034082, 4068164, 5085205, 8136328, 10170410, 16272656, 20340820, 40681640, 81363280]

約数ペア:

[(1, 81363280), (2, 40681640), (4, 20340820), (5, 16272656), (8, 10170410), (10, 8136328), (16, 5085205), (20, 4068164), (40, 2034082), (80, 1017041)]