21909771

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{20807}}^1$

素因数の和:20832

約数の個数: 20

約数和(自身を含む): 35248752

約数和(自身を除く): 13338981

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 20807, 62421, 187263, 270491, 561789, 811473, 1685367, 2434419, 7303257, 21909771]

約数ペア:

[(1, 21909771), (3, 7303257), (9, 2434419), (13, 1685367), (27, 811473), (39, 561789), (81, 270491), (117, 187263), (351, 62421), (1053, 20807)]