21071505

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{359}}^1$

素因数の和:430

約数の個数: 64

約数和(自身を含む): 42577920

約数和(自身を除く): 21506415

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 43, 65, 91, 105, 129, 195, 215, 273, 301, 359, 455, 559, 645, 903, 1077, 1365, 1505, 1677, 1795, 2513, 2795, 3913, 4515, 4667, 5385, 7539, 8385, 11739, 12565, 14001, 15437, 19565, 23335, 32669, 37695, 46311, 58695, 70005, 77185, 98007, 108059, 163345, 200681, 231555, 324177, 490035, 540295, 602043, 1003405, 1404767, 1620885, 3010215, 4214301, 7023835, 21071505]

約数ペア:

[(1, 21071505), (3, 7023835), (5, 4214301), (7, 3010215), (13, 1620885), (15, 1404767), (21, 1003405), (35, 602043), (39, 540295), (43, 490035), (65, 324177), (91, 231555), (105, 200681), (129, 163345), (195, 108059), (215, 98007), (273, 77185), (301, 70005), (359, 58695), (455, 46311), (559, 37695), (645, 32669), (903, 23335), (1077, 19565), (1365, 15437), (1505, 14001), (1677, 12565), (1795, 11739), (2513, 8385), (2795, 7539), (3913, 5385), (4515, 4667)]