21395945

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{151}}^1\times {\mathrm{1667}}^1$

素因数の和:1840

約数の個数: 16

約数和(自身を含む): 27381888

約数和(自身を除く): 5985943

約数列:

[1, 5, 17, 85, 151, 755, 1667, 2567, 8335, 12835, 28339, 141695, 251717, 1258585, 4279189, 21395945]

約数ペア:

[(1, 21395945), (5, 4279189), (17, 1258585), (85, 251717), (151, 141695), (755, 28339), (1667, 12835), (2567, 8335)]