21664341

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{15733}}^1$

素因数の和:15762

約数の個数: 20

約数和(自身を含む): 34268652

約数和(自身を除く): 12604311

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 459, 1377, 15733, 47199, 141597, 267461, 424791, 802383, 1274373, 2407149, 7221447, 21664341]

約数ペア:

[(1, 21664341), (3, 7221447), (9, 2407149), (17, 1274373), (27, 802383), (51, 424791), (81, 267461), (153, 141597), (459, 47199), (1377, 15733)]