211393805

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{197}}^1$

素因数の和:306

約数の個数: 64

約数和(自身を含む): 321159168

約数和(自身を除く): 109765363

約数列:

[1, 5, 7, 23, 31, 35, 43, 115, 155, 161, 197, 215, 217, 301, 713, 805, 985, 989, 1085, 1333, 1379, 1505, 3565, 4531, 4945, 4991, 6107, 6665, 6895, 6923, 8471, 9331, 22655, 24955, 30535, 30659, 31717, 34615, 42355, 42749, 46655, 59297, 140461, 153295, 158585, 194833, 213745, 214613, 262601, 296485, 702305, 974165, 983227, 1073065, 1313005, 1363831, 1838207, 4916135, 6039823, 6819155, 9191035, 30199115, 42278761, 211393805]

約数ペア:

[(1, 211393805), (5, 42278761), (7, 30199115), (23, 9191035), (31, 6819155), (35, 6039823), (43, 4916135), (115, 1838207), (155, 1363831), (161, 1313005), (197, 1073065), (215, 983227), (217, 974165), (301, 702305), (713, 296485), (805, 262601), (985, 214613), (989, 213745), (1085, 194833), (1333, 158585), (1379, 153295), (1505, 140461), (3565, 59297), (4531, 46655), (4945, 42749), (4991, 42355), (6107, 34615), (6665, 31717), (6895, 30659), (6923, 30535), (8471, 24955), (9331, 22655)]