20281009

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{1223}}^1$

素因数の和:1356

約数の個数: 16

約数和(自身を含む): 24440832

約数和(自身を除く): 4159823

約数列:

[1, 7, 23, 103, 161, 721, 1223, 2369, 8561, 16583, 28129, 125969, 196903, 881783, 2897287, 20281009]

約数ペア:

[(1, 20281009), (7, 2897287), (23, 881783), (103, 196903), (161, 125969), (721, 28129), (1223, 16583), (2369, 8561)]