21537657

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{15641}}^1$

素因数の和:15670

約数の個数: 20

約数和(自身を含む): 34068276

約数和(自身を除く): 12530619

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 459, 1377, 15641, 46923, 140769, 265897, 422307, 797691, 1266921, 2393073, 7179219, 21537657]

約数ペア:

[(1, 21537657), (3, 7179219), (9, 2393073), (17, 1266921), (27, 797691), (51, 422307), (81, 265897), (153, 140769), (459, 46923), (1377, 15641)]