21191331

素因数分解:

$3^1\times 7^1\times {\mathrm{277}}^1\times {\mathrm{3643}}^1$

素因数の和:3930

約数の個数: 16

約数和(自身を含む): 32417024

約数和(自身を除く): 11225693

約数列:

[1, 3, 7, 21, 277, 831, 1939, 3643, 5817, 10929, 25501, 76503, 1009111, 3027333, 7063777, 21191331]

約数ペア:

[(1, 21191331), (3, 7063777), (7, 3027333), (21, 1009111), (277, 76503), (831, 25501), (1939, 10929), (3643, 5817)]