81300020

素因数分解:

$2^2\times 5^1\times {\mathrm{4065001}}^1$

素因数の和:4065010

約数の個数: 12

約数和(自身を含む): 170730084

約数和(自身を除く): 89430064

約数列:

[1, 2, 4, 5, 10, 20, 4065001, 8130002, 16260004, 20325005, 40650010, 81300020]

約数ペア:

[(1, 81300020), (2, 40650010), (4, 20325005), (5, 16260004), (10, 8130002), (20, 4065001)]