21306999

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53401}}^1$

素因数の和:53430

約数の個数: 16

約数和(自身を含む): 34177280

約数和(自身を除く): 12870281

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 53401, 160203, 373807, 1014619, 1121421, 3043857, 7102333, 21306999]

約数ペア:

[(1, 21306999), (3, 7102333), (7, 3043857), (19, 1121421), (21, 1014619), (57, 373807), (133, 160203), (399, 53401)]