21609909

素因数分解:

$3^4\times {\mathrm{431}}^1\times {\mathrm{619}}^1$

素因数の和:1062

約数の個数: 20

約数和(自身を含む): 32408640

約数和(自身を除く): 10798731

約数列:

[1, 3, 9, 27, 81, 431, 619, 1293, 1857, 3879, 5571, 11637, 16713, 34911, 50139, 266789, 800367, 2401101, 7203303, 21609909]

約数ペア:

[(1, 21609909), (3, 7203303), (9, 2401101), (27, 800367), (81, 266789), (431, 50139), (619, 34911), (1293, 16713), (1857, 11637), (3879, 5571)]