81272020

素因数分解:

$2^2\times 5^1\times {\mathrm{4063601}}^1$

素因数の和:4063610

約数の個数: 12

約数和(自身を含む): 170671284

約数和(自身を除く): 89399264

約数列:

[1, 2, 4, 5, 10, 20, 4063601, 8127202, 16254404, 20318005, 40636010, 81272020]

約数ペア:

[(1, 81272020), (2, 40636010), (4, 20318005), (5, 16254404), (10, 8127202), (20, 4063601)]