21332515

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{313}}^1\times {\mathrm{317}}^1$

素因数の和:678

約数の個数: 16

約数和(自身を含む): 26360928

約数和(自身を除く): 5028413

約数列:

[1, 5, 43, 215, 313, 317, 1565, 1585, 13459, 13631, 67295, 68155, 99221, 496105, 4266503, 21332515]

約数ペア:

[(1, 21332515), (5, 4266503), (43, 496105), (215, 99221), (313, 68155), (317, 67295), (1565, 13631), (1585, 13459)]