20820963

素因数分解:

$3^1\times {\mathrm{71}}^1\times {\mathrm{239}}^1\times {\mathrm{409}}^1$

素因数の和:722

約数の個数: 16

約数和(自身を含む): 28339200

約数和(自身を除く): 7518237

約数列:

[1, 3, 71, 213, 239, 409, 717, 1227, 16969, 29039, 50907, 87117, 97751, 293253, 6940321, 20820963]

約数ペア:

[(1, 20820963), (3, 6940321), (71, 293253), (213, 97751), (239, 87117), (409, 50907), (717, 29039), (1227, 16969)]