81050180

素因数分解:

$2^2\times 5^1\times {\mathrm{4052509}}^1$

素因数の和:4052518

約数の個数: 12

約数和(自身を含む): 170205420

約数和(自身を除く): 89155240

約数列:

[1, 2, 4, 5, 10, 20, 4052509, 8105018, 16210036, 20262545, 40525090, 81050180]

約数ペア:

[(1, 81050180), (2, 40525090), (4, 20262545), (5, 16210036), (10, 8105018), (20, 4052509)]