21149649

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{1009}}^1$

素因数の和:1169

約数の個数: 24

約数和(自身を含む): 32614920

約数和(自身を除く): 11465271

約数列:

[1, 3, 9, 17, 51, 137, 153, 411, 1009, 1233, 2329, 3027, 6987, 9081, 17153, 20961, 51459, 138233, 154377, 414699, 1244097, 2349961, 7049883, 21149649]

約数ペア:

[(1, 21149649), (3, 7049883), (9, 2349961), (17, 1244097), (51, 414699), (137, 154377), (153, 138233), (411, 51459), (1009, 20961), (1233, 17153), (2329, 9081), (3027, 6987)]