21817035

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^2\times {\mathrm{79}}^1$

素因数の和:145

約数の個数: 72

約数和(自身を含む): 42793920

約数和(自身を除く): 20976885

約数列:

[1, 3, 5, 9, 15, 17, 19, 45, 51, 57, 79, 85, 95, 153, 171, 237, 255, 285, 323, 361, 395, 711, 765, 855, 969, 1083, 1185, 1343, 1501, 1615, 1805, 2907, 3249, 3555, 4029, 4503, 4845, 5415, 6137, 6715, 7505, 12087, 13509, 14535, 16245, 18411, 20145, 22515, 25517, 28519, 30685, 55233, 60435, 67545, 76551, 85557, 92055, 127585, 142595, 229653, 256671, 276165, 382755, 427785, 484823, 1148265, 1283355, 1454469, 2424115, 4363407, 7272345, 21817035]

約数ペア:

[(1, 21817035), (3, 7272345), (5, 4363407), (9, 2424115), (15, 1454469), (17, 1283355), (19, 1148265), (45, 484823), (51, 427785), (57, 382755), (79, 276165), (85, 256671), (95, 229653), (153, 142595), (171, 127585), (237, 92055), (255, 85557), (285, 76551), (323, 67545), (361, 60435), (395, 55233), (711, 30685), (765, 28519), (855, 25517), (969, 22515), (1083, 20145), (1185, 18411), (1343, 16245), (1501, 14535), (1615, 13509), (1805, 12087), (2907, 7505), (3249, 6715), (3555, 6137), (4029, 5415), (4503, 4845)]