28420378

素因数分解:

$2^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{19709}}^1$

素因数の和:19821

約数の個数: 16

約数和(自身を含む): 49196160

約数和(自身を除く): 20775782

約数列:

[1, 2, 7, 14, 103, 206, 721, 1442, 19709, 39418, 137963, 275926, 2030027, 4060054, 14210189, 28420378]

約数ペア:

[(1, 28420378), (2, 14210189), (7, 4060054), (14, 2030027), (103, 275926), (206, 137963), (721, 39418), (1442, 19709)]