21216501

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{751}}^1$

素因数の和:873

約数の個数: 24

約数和(自身を含む): 31830656

約数和(自身を除く): 10614155

約数列:

[1, 3, 9, 43, 73, 129, 219, 387, 657, 751, 2253, 3139, 6759, 9417, 28251, 32293, 54823, 96879, 164469, 290637, 493407, 2357389, 7072167, 21216501]

約数ペア:

[(1, 21216501), (3, 7072167), (9, 2357389), (43, 493407), (73, 290637), (129, 164469), (219, 96879), (387, 54823), (657, 32293), (751, 28251), (2253, 9417), (3139, 6759)]