21371391

素因数分解:

$3^3\times {\mathrm{643}}^1\times {\mathrm{1231}}^1$

素因数の和:1883

約数の個数: 16

約数和(自身を含む): 31736320

約数和(自身を除く): 10364929

約数列:

[1, 3, 9, 27, 643, 1231, 1929, 3693, 5787, 11079, 17361, 33237, 791533, 2374599, 7123797, 21371391]

約数ペア:

[(1, 21371391), (3, 7123797), (9, 2374599), (27, 791533), (643, 33237), (1231, 17361), (1929, 11079), (3693, 5787)]