21945249

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{15937}}^1$

素因数の和:15966

約数の個数: 20

約数和(自身を含む): 34712964

約数和(自身を除く): 12767715

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 459, 1377, 15937, 47811, 143433, 270929, 430299, 812787, 1290897, 2438361, 7315083, 21945249]

約数ペア:

[(1, 21945249), (3, 7315083), (9, 2438361), (17, 1290897), (27, 812787), (51, 430299), (81, 270929), (153, 143433), (459, 47811), (1377, 15937)]