20090020

素因数分解:

$2^2\times 5^1\times {\mathrm{1004501}}^1$

素因数の和:1004510

約数の個数: 12

約数和(自身を含む): 42189084

約数和(自身を除く): 22099064

約数列:

[1, 2, 4, 5, 10, 20, 1004501, 2009002, 4018004, 5022505, 10045010, 20090020]

約数ペア:

[(1, 20090020), (2, 10045010), (4, 5022505), (5, 4018004), (10, 2009002), (20, 1004501)]