645489

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{613}}^1$

素因数の和:638

約数の個数: 20

約数和(自身を含む): 1040116

約数和(自身を除く): 394627

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 613, 1053, 1839, 5517, 7969, 16551, 23907, 49653, 71721, 215163, 645489]

約数ペア:

[(1, 645489), (3, 215163), (9, 71721), (13, 49653), (27, 23907), (39, 16551), (81, 7969), (117, 5517), (351, 1839), (613, 1053)]