81254020

素因数分解:

$2^2\times 5^1\times {\mathrm{4062701}}^1$

素因数の和:4062710

約数の個数: 12

約数和(自身を含む): 170633484

約数和(自身を除く): 89379464

約数列:

[1, 2, 4, 5, 10, 20, 4062701, 8125402, 16250804, 20313505, 40627010, 81254020]

約数ペア:

[(1, 81254020), (2, 40627010), (4, 20313505), (5, 16250804), (10, 8125402), (20, 4062701)]