21028605

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{107839}}^1$

素因数の和:107860

約数の個数: 16

約数和(自身を含む): 36234240

約数和(自身を除く): 15205635

約数列:

[1, 3, 5, 13, 15, 39, 65, 195, 107839, 323517, 539195, 1401907, 1617585, 4205721, 7009535, 21028605]

約数ペア:

[(1, 21028605), (3, 7009535), (5, 4205721), (13, 1617585), (15, 1401907), (39, 539195), (65, 323517), (195, 107839)]