20421639

素因数分解:

$3^4\times 7^1\times {\mathrm{36017}}^1$

素因数の和:36036

約数の個数: 20

約数和(自身を含む): 34865424

約数和(自身を除く): 14443785

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 36017, 108051, 252119, 324153, 756357, 972459, 2269071, 2917377, 6807213, 20421639]

約数ペア:

[(1, 20421639), (3, 6807213), (7, 2917377), (9, 2269071), (21, 972459), (27, 756357), (63, 324153), (81, 252119), (189, 108051), (567, 36017)]