18400431

素因数分解:

$3^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:172

約数の個数: 48

約数和(自身を含む): 30336768

約数和(自身を除く): 11936337

約数列:

[1, 3, 7, 21, 41, 43, 49, 71, 123, 129, 147, 213, 287, 301, 497, 861, 903, 1491, 1763, 2009, 2107, 2911, 3053, 3479, 5289, 6027, 6321, 8733, 9159, 10437, 12341, 20377, 21371, 37023, 61131, 64113, 86387, 125173, 142639, 149597, 259161, 375519, 427917, 448791, 876211, 2628633, 6133477, 18400431]

約数ペア:

[(1, 18400431), (3, 6133477), (7, 2628633), (21, 876211), (41, 448791), (43, 427917), (49, 375519), (71, 259161), (123, 149597), (129, 142639), (147, 125173), (213, 86387), (287, 64113), (301, 61131), (497, 37023), (861, 21371), (903, 20377), (1491, 12341), (1763, 10437), (2009, 9159), (2107, 8733), (2911, 6321), (3053, 6027), (3479, 5289)]