18209989

素因数分解:

$7^1\times {\mathrm{31}}^2\times {\mathrm{2707}}^1$

素因数の和:2776

約数の個数: 12

約数和(自身を含む): 21512352

約数和(自身を除く): 3302363

約数列:

[1, 7, 31, 217, 961, 2707, 6727, 18949, 83917, 587419, 2601427, 18209989]

約数ペア:

[(1, 18209989), (7, 2601427), (31, 587419), (217, 83917), (961, 18949), (2707, 6727)]