56721

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1$

素因数の和:120

約数の個数: 16

約数和(自身を含む): 89984

約数和(自身を除く): 33263

約数列:

[1, 3, 7, 21, 37, 73, 111, 219, 259, 511, 777, 1533, 2701, 8103, 18907, 56721]

約数ペア:

[(1, 56721), (3, 18907), (7, 8103), (21, 2701), (37, 1533), (73, 777), (111, 511), (219, 259)]