21304909

素因数分解:

${\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{293}}^1$

素因数の和:444

約数の個数: 16

約数和(自身を含む): 23284800

約数和(自身を除く): 1979891

約数列:

[1, 19, 43, 89, 293, 817, 1691, 3827, 5567, 12599, 26077, 72713, 239381, 495463, 1121311, 21304909]

約数ペア:

[(1, 21304909), (19, 1121311), (43, 495463), (89, 239381), (293, 72713), (817, 26077), (1691, 12599), (3827, 5567)]