21139959

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{163}}^1\times {\mathrm{2543}}^1$

素因数の和:2726

約数の個数: 16

約数和(自身を含む): 30039552

約数和(自身を除く): 8899593

約数列:

[1, 3, 17, 51, 163, 489, 2543, 2771, 7629, 8313, 43231, 129693, 414509, 1243527, 7046653, 21139959]

約数ペア:

[(1, 21139959), (3, 7046653), (17, 1243527), (51, 414509), (163, 129693), (489, 43231), (2543, 8313), (2771, 7629)]