21391803

素因数分解:

$3^3\times {\mathrm{71}}^1\times {\mathrm{11159}}^1$

素因数の和:11239

約数の個数: 16

約数和(自身を含む): 32140800

約数和(自身を除く): 10748997

約数列:

[1, 3, 9, 27, 71, 213, 639, 1917, 11159, 33477, 100431, 301293, 792289, 2376867, 7130601, 21391803]

約数ペア:

[(1, 21391803), (3, 7130601), (9, 2376867), (27, 792289), (71, 301293), (213, 100431), (639, 33477), (1917, 11159)]