20649321

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{359}}^1$

素因数の和:466

約数の個数: 48

約数和(自身を含む): 37739520

約数和(自身を除く): 17090199

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 77, 83, 99, 231, 249, 359, 581, 693, 747, 913, 1077, 1743, 2513, 2739, 3231, 3949, 5229, 6391, 7539, 8217, 11847, 19173, 22617, 27643, 29797, 35541, 57519, 82929, 89391, 208579, 248787, 268173, 327767, 625737, 983301, 1877211, 2294369, 2949903, 6883107, 20649321]

約数ペア:

[(1, 20649321), (3, 6883107), (7, 2949903), (9, 2294369), (11, 1877211), (21, 983301), (33, 625737), (63, 327767), (77, 268173), (83, 248787), (99, 208579), (231, 89391), (249, 82929), (359, 57519), (581, 35541), (693, 29797), (747, 27643), (913, 22617), (1077, 19173), (1743, 11847), (2513, 8217), (2739, 7539), (3231, 6391), (3949, 5229)]