20820020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{80077}}^1$

素因数の和:80099

約数の個数: 24

約数和(自身を含む): 47085864

約数和(自身を除く): 26265844

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 80077, 160154, 320308, 400385, 800770, 1041001, 1601540, 2082002, 4164004, 5205005, 10410010, 20820020]

約数ペア:

[(1, 20820020), (2, 10410010), (4, 5205005), (5, 4164004), (10, 2082002), (13, 1601540), (20, 1041001), (26, 800770), (52, 400385), (65, 320308), (130, 160154), (260, 80077)]