19891089

素因数分解:

$3^4\times {\mathrm{37}}^1\times {\mathrm{6637}}^1$

素因数の和:6686

約数の個数: 20

約数和(自身を含む): 30521524

約数和(自身を除く): 10630435

約数列:

[1, 3, 9, 27, 37, 81, 111, 333, 999, 2997, 6637, 19911, 59733, 179199, 245569, 537597, 736707, 2210121, 6630363, 19891089]

約数ペア:

[(1, 19891089), (3, 6630363), (9, 2210121), (27, 736707), (37, 537597), (81, 245569), (111, 179199), (333, 59733), (999, 19911), (2997, 6637)]