20838740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{80149}}^1$

素因数の和:80171

約数の個数: 24

約数和(自身を含む): 47128200

約数和(自身を除く): 26289460

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 80149, 160298, 320596, 400745, 801490, 1041937, 1602980, 2083874, 4167748, 5209685, 10419370, 20838740]

約数ペア:

[(1, 20838740), (2, 10419370), (4, 5209685), (5, 4167748), (10, 2083874), (13, 1602980), (20, 1041937), (26, 801490), (52, 400745), (65, 320596), (130, 160298), (260, 80149)]