21375657

素因数分解:

$3^4\times {\mathrm{163}}^1\times {\mathrm{1619}}^1$

素因数の和:1794

約数の個数: 20

約数和(自身を含む): 32147280

約数和(自身を除く): 10771623

約数列:

[1, 3, 9, 27, 81, 163, 489, 1467, 1619, 4401, 4857, 13203, 14571, 43713, 131139, 263897, 791691, 2375073, 7125219, 21375657]

約数ペア:

[(1, 21375657), (3, 7125219), (9, 2375073), (27, 791691), (81, 263897), (163, 131139), (489, 43713), (1467, 14571), (1619, 13203), (4401, 4857)]