20921091

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{127}}^1\times {\mathrm{1277}}^1$

素因数の和:1450

約数の個数: 16

約数和(自身を含む): 28790784

約数和(自身を除く): 7869693

約数列:

[1, 3, 43, 127, 129, 381, 1277, 3831, 5461, 16383, 54911, 162179, 164733, 486537, 6973697, 20921091]

約数ペア:

[(1, 20921091), (3, 6973697), (43, 486537), (127, 164733), (129, 162179), (381, 54911), (1277, 16383), (3831, 5461)]