20865260

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{80251}}^1$

素因数の和:80273

約数の個数: 24

約数和(自身を含む): 47188176

約数和(自身を除く): 26322916

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 80251, 160502, 321004, 401255, 802510, 1043263, 1605020, 2086526, 4173052, 5216315, 10432630, 20865260]

約数ペア:

[(1, 20865260), (2, 10432630), (4, 5216315), (5, 4173052), (10, 2086526), (13, 1605020), (20, 1043263), (26, 802510), (52, 401255), (65, 321004), (130, 160502), (260, 80251)]