639969

素因数分解:

$3^1\times {\mathrm{11}}^2\times {\mathrm{41}}^1\times {\mathrm{43}}^1$

素因数の和:109

約数の個数: 24

約数和(自身を含む): 983136

約数和(自身を除く): 343167

約数列:

[1, 3, 11, 33, 41, 43, 121, 123, 129, 363, 451, 473, 1353, 1419, 1763, 4961, 5203, 5289, 14883, 15609, 19393, 58179, 213323, 639969]

約数ペア:

[(1, 639969), (3, 213323), (11, 58179), (33, 19393), (41, 15609), (43, 14883), (121, 5289), (123, 5203), (129, 4961), (363, 1763), (451, 1419), (473, 1353)]