21939903

素因数分解:

$3^4\times {\mathrm{439}}^1\times {\mathrm{617}}^1$

素因数の和:1068

約数の個数: 20

約数和(自身を含む): 32902320

約数和(自身を除く): 10962417

約数列:

[1, 3, 9, 27, 81, 439, 617, 1317, 1851, 3951, 5553, 11853, 16659, 35559, 49977, 270863, 812589, 2437767, 7313301, 21939903]

約数ペア:

[(1, 21939903), (3, 7313301), (9, 2437767), (27, 812589), (81, 270863), (439, 49977), (617, 35559), (1317, 16659), (1851, 11853), (3951, 5553)]