20938815

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{271}}^1$

素因数の和:400

約数の個数: 48

約数和(自身を含む): 38952576

約数和(自身を除く): 18013761

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 101, 153, 255, 271, 303, 505, 765, 813, 909, 1355, 1515, 1717, 2439, 4065, 4545, 4607, 5151, 8585, 12195, 13821, 15453, 23035, 25755, 27371, 41463, 69105, 77265, 82113, 136855, 207315, 246339, 410565, 465307, 1231695, 1395921, 2326535, 4187763, 6979605, 20938815]

約数ペア:

[(1, 20938815), (3, 6979605), (5, 4187763), (9, 2326535), (15, 1395921), (17, 1231695), (45, 465307), (51, 410565), (85, 246339), (101, 207315), (153, 136855), (255, 82113), (271, 77265), (303, 69105), (505, 41463), (765, 27371), (813, 25755), (909, 23035), (1355, 15453), (1515, 13821), (1717, 12195), (2439, 8585), (4065, 5151), (4545, 4607)]