21165675

素因数分解:

$3^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{6563}}^1$

素因数の和:6619

約数の個数: 24

約数和(自身を含む): 35813184

約数和(自身を除く): 14647509

約数列:

[1, 3, 5, 15, 25, 43, 75, 129, 215, 645, 1075, 3225, 6563, 19689, 32815, 98445, 164075, 282209, 492225, 846627, 1411045, 4233135, 7055225, 21165675]

約数ペア:

[(1, 21165675), (3, 7055225), (5, 4233135), (15, 1411045), (25, 846627), (43, 492225), (75, 282209), (129, 164075), (215, 98445), (645, 32815), (1075, 19689), (3225, 6563)]