21785071

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{12301}}^1$

素因数の和:12342

約数の個数: 16

約数和(自身を含む): 28343808

約数和(自身を除く): 6558737

約数列:

[1, 7, 11, 23, 77, 161, 253, 1771, 12301, 86107, 135311, 282923, 947177, 1980461, 3112153, 21785071]

約数ペア:

[(1, 21785071), (7, 3112153), (11, 1980461), (23, 947177), (77, 282923), (161, 135311), (253, 86107), (1771, 12301)]