21349089

素因数分解:

$3^4\times {\mathrm{53}}^1\times {\mathrm{4973}}^1$

素因数の和:5038

約数の個数: 20

約数和(自身を含む): 32500116

約数和(自身を除く): 11151027

約数列:

[1, 3, 9, 27, 53, 81, 159, 477, 1431, 4293, 4973, 14919, 44757, 134271, 263569, 402813, 790707, 2372121, 7116363, 21349089]

約数ペア:

[(1, 21349089), (3, 7116363), (9, 2372121), (27, 790707), (53, 402813), (81, 263569), (159, 134271), (477, 44757), (1431, 14919), (4293, 4973)]