21089121

素因数分解:

$3^1\times {\mathrm{67}}^1\times {\mathrm{239}}^1\times {\mathrm{439}}^1$

素因数の和:748

約数の個数: 16

約数和(自身を含む): 28723200

約数和(自身を除く): 7634079

約数列:

[1, 3, 67, 201, 239, 439, 717, 1317, 16013, 29413, 48039, 88239, 104921, 314763, 7029707, 21089121]

約数ペア:

[(1, 21089121), (3, 7029707), (67, 314763), (201, 104921), (239, 88239), (439, 48039), (717, 29413), (1317, 16013)]