21758139

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{20663}}^1$

素因数の和:20688

約数の個数: 20

約数和(自身を含む): 35004816

約数和(自身を除く): 13246677

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 20663, 61989, 185967, 268619, 557901, 805857, 1673703, 2417571, 7252713, 21758139]

約数ペア:

[(1, 21758139), (3, 7252713), (9, 2417571), (13, 1673703), (27, 805857), (39, 557901), (81, 268619), (117, 185967), (351, 61989), (1053, 20663)]