21711291

素因数分解:

$3^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{19507}}^1$

素因数の和:19570

約数の個数: 16

約数和(自身を含む): 33709824

約数和(自身を除く): 11998533

約数列:

[1, 3, 7, 21, 53, 159, 371, 1113, 19507, 58521, 136549, 409647, 1033871, 3101613, 7237097, 21711291]

約数ペア:

[(1, 21711291), (3, 7237097), (7, 3101613), (21, 1033871), (53, 409647), (159, 136549), (371, 58521), (1113, 19507)]