21452240

素因数分解:

$2^4\times 5^1\times {\mathrm{268153}}^1$

素因数の和:268166

約数の個数: 20

約数和(自身を含む): 49876644

約数和(自身を除く): 28424404

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 268153, 536306, 1072612, 1340765, 2145224, 2681530, 4290448, 5363060, 10726120, 21452240]

約数ペア:

[(1, 21452240), (2, 10726120), (4, 5363060), (5, 4290448), (8, 2681530), (10, 2145224), (16, 1340765), (20, 1072612), (40, 536306), (80, 268153)]