21238335

素因数分解:

$3^3\times 5^1\times {\mathrm{157321}}^1$

素因数の和:157335

約数の個数: 16

約数和(自身を含む): 37757280

約数和(自身を除く): 16518945

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 157321, 471963, 786605, 1415889, 2359815, 4247667, 7079445, 21238335]

約数ペア:

[(1, 21238335), (3, 7079445), (5, 4247667), (9, 2359815), (15, 1415889), (27, 786605), (45, 471963), (135, 157321)]