20784285

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{269}}^1$

素因数の和:398

約数の個数: 48

約数和(自身を含む): 38666160

約数和(自身を除く): 17881875

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 101, 153, 255, 269, 303, 505, 765, 807, 909, 1345, 1515, 1717, 2421, 4035, 4545, 4573, 5151, 8585, 12105, 13719, 15453, 22865, 25755, 27169, 41157, 68595, 77265, 81507, 135845, 205785, 244521, 407535, 461873, 1222605, 1385619, 2309365, 4156857, 6928095, 20784285]

約数ペア:

[(1, 20784285), (3, 6928095), (5, 4156857), (9, 2309365), (15, 1385619), (17, 1222605), (45, 461873), (51, 407535), (85, 244521), (101, 205785), (153, 135845), (255, 81507), (269, 77265), (303, 68595), (505, 41157), (765, 27169), (807, 25755), (909, 22865), (1345, 15453), (1515, 13719), (1717, 12105), (2421, 8585), (4035, 5151), (4545, 4573)]