21289881

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{239}}^1\times {\mathrm{1291}}^1$

素因数の和:1556

約数の個数: 16

約数和(自身を含む): 29767680

約数和(自身を除く): 8477799

約数列:

[1, 3, 23, 69, 239, 717, 1291, 3873, 5497, 16491, 29693, 89079, 308549, 925647, 7096627, 21289881]

約数ペア:

[(1, 21289881), (3, 7096627), (23, 925647), (69, 308549), (239, 89079), (717, 29693), (1291, 16491), (3873, 5497)]