21784725

素因数分解:

$3^2\times 5^2\times {\mathrm{96821}}^1$

素因数の和:96837

約数の個数: 18

約数和(自身を含む): 39019266

約数和(自身を除く): 17234541

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 225, 96821, 290463, 484105, 871389, 1452315, 2420525, 4356945, 7261575, 21784725]

約数ペア:

[(1, 21784725), (3, 7261575), (5, 4356945), (9, 2420525), (15, 1452315), (25, 871389), (45, 484105), (75, 290463), (225, 96821)]