200810020

素因数分解:

$2^2\times 5^1\times {\mathrm{10040501}}^1$

素因数の和:10040510

約数の個数: 12

約数和(自身を含む): 421701084

約数和(自身を除く): 220891064

約数列:

[1, 2, 4, 5, 10, 20, 10040501, 20081002, 40162004, 50202505, 100405010, 200810020]

約数ペア:

[(1, 200810020), (2, 100405010), (4, 50202505), (5, 40162004), (10, 20081002), (20, 10040501)]