21535755

素因数分解:

$3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{103}}^1\times {\mathrm{263}}^1$

素因数の和:427

約数の個数: 32

約数和(自身を含む): 35582976

約数和(自身を除く): 14047221

約数列:

[1, 3, 5, 15, 53, 103, 159, 263, 265, 309, 515, 789, 795, 1315, 1545, 3945, 5459, 13939, 16377, 27089, 27295, 41817, 69695, 81267, 81885, 135445, 209085, 406335, 1435717, 4307151, 7178585, 21535755]

約数ペア:

[(1, 21535755), (3, 7178585), (5, 4307151), (15, 1435717), (53, 406335), (103, 209085), (159, 135445), (263, 81885), (265, 81267), (309, 69695), (515, 41817), (789, 27295), (795, 27089), (1315, 16377), (1545, 13939), (3945, 5459)]