19982879

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{1297}}^1$

素因数の和:1406

約数の個数: 16

約数和(自身を含む): 23924736

約数和(自身を除く): 3941857

約数列:

[1, 7, 31, 71, 217, 497, 1297, 2201, 9079, 15407, 40207, 92087, 281449, 644609, 2854697, 19982879]

約数ペア:

[(1, 19982879), (7, 2854697), (31, 644609), (71, 281449), (217, 92087), (497, 40207), (1297, 15407), (2201, 9079)]