1680021

素因数分解:

$3^4\times 7^1\times {\mathrm{2963}}^1$

素因数の和:2982

約数の個数: 20

約数和(自身を含む): 2869152

約数和(自身を除く): 1189131

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 2963, 8889, 20741, 26667, 62223, 80001, 186669, 240003, 560007, 1680021]

約数ペア:

[(1, 1680021), (3, 560007), (7, 240003), (9, 186669), (21, 80001), (27, 62223), (63, 26667), (81, 20741), (189, 8889), (567, 2963)]