20720853

素因数分解:

$3^5\times {\mathrm{71}}^1\times {\mathrm{1201}}^1$

素因数の和:1287

約数の個数: 24

約数和(自身を含む): 31502016

約数和(自身を除く): 10781163

約数列:

[1, 3, 9, 27, 71, 81, 213, 243, 639, 1201, 1917, 3603, 5751, 10809, 17253, 32427, 85271, 97281, 255813, 291843, 767439, 2302317, 6906951, 20720853]

約数ペア:

[(1, 20720853), (3, 6906951), (9, 2302317), (27, 767439), (71, 291843), (81, 255813), (213, 97281), (243, 85271), (639, 32427), (1201, 17253), (1917, 10809), (3603, 5751)]