28139909

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{1259}}^1$

素因数の和:1400

約数の個数: 16

約数和(自身を含む): 33546240

約数和(自身を除く): 5406331

約数列:

[1, 7, 31, 103, 217, 721, 1259, 3193, 8813, 22351, 39029, 129677, 273203, 907739, 4019987, 28139909]

約数ペア:

[(1, 28139909), (7, 4019987), (31, 907739), (103, 273203), (217, 129677), (721, 39029), (1259, 22351), (3193, 8813)]