19701981

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{56131}}^1$

素因数の和:56153

約数の個数: 16

約数和(自身を含む): 31433920

約数和(自身を除く): 11731939

約数列:

[1, 3, 9, 13, 27, 39, 117, 351, 56131, 168393, 505179, 729703, 1515537, 2189109, 6567327, 19701981]

約数ペア:

[(1, 19701981), (3, 6567327), (9, 2189109), (13, 1515537), (27, 729703), (39, 505179), (117, 168393), (351, 56131)]