639171

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{607}}^1$

素因数の和:632

約数の個数: 20

約数和(自身を含む): 1029952

約数和(自身を除く): 390781

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 607, 1053, 1821, 5463, 7891, 16389, 23673, 49167, 71019, 213057, 639171]

約数ペア:

[(1, 639171), (3, 213057), (9, 71019), (13, 49167), (27, 23673), (39, 16389), (81, 7891), (117, 5463), (351, 1821), (607, 1053)]