18720357

素因数分解:

$3^1\times {\mathrm{71}}^1\times {\mathrm{179}}^1\times {\mathrm{491}}^1$

素因数の和:744

約数の個数: 16

約数和(自身を含む): 25505280

約数和(自身を除く): 6784923

約数列:

[1, 3, 71, 179, 213, 491, 537, 1473, 12709, 34861, 38127, 87889, 104583, 263667, 6240119, 18720357]

約数ペア:

[(1, 18720357), (3, 6240119), (71, 263667), (179, 104583), (213, 87889), (491, 38127), (537, 34861), (1473, 12709)]