21236781

素因数分解:

$3^1\times {\mathrm{137}}^1\times {\mathrm{163}}^1\times {\mathrm{317}}^1$

素因数の和:620

約数の個数: 16

約数和(自身を含む): 28787904

約数和(自身を除く): 7551123

約数列:

[1, 3, 137, 163, 317, 411, 489, 951, 22331, 43429, 51671, 66993, 130287, 155013, 7078927, 21236781]

約数ペア:

[(1, 21236781), (3, 7078927), (137, 155013), (163, 130287), (317, 66993), (411, 51671), (489, 43429), (951, 22331)]