809780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{2131}}^1$

素因数の和:2159

約数の個数: 24

約数和(自身を含む): 1790880

約数和(自身を除く): 981100

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 2131, 4262, 8524, 10655, 21310, 40489, 42620, 80978, 161956, 202445, 404890, 809780]

約数ペア:

[(1, 809780), (2, 404890), (4, 202445), (5, 161956), (10, 80978), (19, 42620), (20, 40489), (38, 21310), (76, 10655), (95, 8524), (190, 4262), (380, 2131)]