21700755

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{1493}}^1$

素因数の和:1540

約数の個数: 48

約数和(自身を含む): 41951520

約数和(自身を除く): 20250765

約数列:

[1, 3, 5, 9, 15, 17, 19, 45, 51, 57, 85, 95, 153, 171, 255, 285, 323, 765, 855, 969, 1493, 1615, 2907, 4479, 4845, 7465, 13437, 14535, 22395, 25381, 28367, 67185, 76143, 85101, 126905, 141835, 228429, 255303, 380715, 425505, 482239, 1142145, 1276515, 1446717, 2411195, 4340151, 7233585, 21700755]

約数ペア:

[(1, 21700755), (3, 7233585), (5, 4340151), (9, 2411195), (15, 1446717), (17, 1276515), (19, 1142145), (45, 482239), (51, 425505), (57, 380715), (85, 255303), (95, 228429), (153, 141835), (171, 126905), (255, 85101), (285, 76143), (323, 67185), (765, 28367), (855, 25381), (969, 22395), (1493, 14535), (1615, 13437), (2907, 7465), (4479, 4845)]