21065584

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{77447}}^1$

素因数の和:77472

約数の個数: 20

約数和(自身を含む): 43215984

約数和(自身を除く): 22150400

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 77447, 154894, 309788, 619576, 1239152, 1316599, 2633198, 5266396, 10532792, 21065584]

約数ペア:

[(1, 21065584), (2, 10532792), (4, 5266396), (8, 2633198), (16, 1316599), (17, 1239152), (34, 619576), (68, 309788), (136, 154894), (272, 77447)]