21309951

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{3931}}^1$

素因数の和:4086

約数の個数: 16

約数和(自身を含む): 30826880

約数和(自身を除く): 9516929

約数列:

[1, 3, 13, 39, 139, 417, 1807, 3931, 5421, 11793, 51103, 153309, 546409, 1639227, 7103317, 21309951]

約数ペア:

[(1, 21309951), (3, 7103317), (13, 1639227), (39, 546409), (139, 153309), (417, 51103), (1807, 11793), (3931, 5421)]