638963019

素因数分解:

$3^3\times {\mathrm{107}}^1\times {\mathrm{221171}}^1$

素因数の和:221287

約数の個数: 16

約数和(自身を含む): 955463040

約数和(自身を除く): 316500021

約数列:

[1, 3, 9, 27, 107, 321, 963, 2889, 221171, 663513, 1990539, 5971617, 23665297, 70995891, 212987673, 638963019]

約数ペア:

[(1, 638963019), (3, 212987673), (9, 70995891), (27, 23665297), (107, 5971617), (321, 1990539), (963, 663513), (2889, 221171)]