20320695

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{263}}^1$

素因数の和:392

約数の個数: 48

約数和(自身を含む): 37806912

約数和(自身を除く): 17486217

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 101, 153, 255, 263, 303, 505, 765, 789, 909, 1315, 1515, 1717, 2367, 3945, 4471, 4545, 5151, 8585, 11835, 13413, 15453, 22355, 25755, 26563, 40239, 67065, 77265, 79689, 132815, 201195, 239067, 398445, 451571, 1195335, 1354713, 2257855, 4064139, 6773565, 20320695]

約数ペア:

[(1, 20320695), (3, 6773565), (5, 4064139), (9, 2257855), (15, 1354713), (17, 1195335), (45, 451571), (51, 398445), (85, 239067), (101, 201195), (153, 132815), (255, 79689), (263, 77265), (303, 67065), (505, 40239), (765, 26563), (789, 25755), (909, 22355), (1315, 15453), (1515, 13413), (1717, 11835), (2367, 8585), (3945, 5151), (4471, 4545)]