21214791

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{20147}}^1$

素因数の和:20172

約数の個数: 20

約数和(自身を含む): 34130712

約数和(自身を除く): 12915921

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 20147, 60441, 181323, 261911, 543969, 785733, 1631907, 2357199, 7071597, 21214791]

約数ペア:

[(1, 21214791), (3, 7071597), (9, 2357199), (13, 1631907), (27, 785733), (39, 543969), (81, 261911), (117, 181323), (351, 60441), (1053, 20147)]