20980260

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16651}}^1$

素因数の和:16673

約数の個数: 72

約数和(自身を含む): 72735936

約数和(自身を除く): 51755676

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 16651, 33302, 49953, 66604, 83255, 99906, 116557, 149859, 166510, 199812, 233114, 249765, 299718, 333020, 349671, 466228, 499530, 582785, 599436, 699342, 749295, 999060, 1049013, 1165570, 1398684, 1498590, 1748355, 2098026, 2331140, 2997180, 3496710, 4196052, 5245065, 6993420, 10490130, 20980260]

約数ペア:

[(1, 20980260), (2, 10490130), (3, 6993420), (4, 5245065), (5, 4196052), (6, 3496710), (7, 2997180), (9, 2331140), (10, 2098026), (12, 1748355), (14, 1498590), (15, 1398684), (18, 1165570), (20, 1049013), (21, 999060), (28, 749295), (30, 699342), (35, 599436), (36, 582785), (42, 499530), (45, 466228), (60, 349671), (63, 333020), (70, 299718), (84, 249765), (90, 233114), (105, 199812), (126, 166510), (140, 149859), (180, 116557), (210, 99906), (252, 83255), (315, 66604), (420, 49953), (630, 33302), (1260, 16651)]