20181616

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{167}}^1$

素因数の和:278

約数の個数: 80

約数和(自身を含む): 48996864

約数和(自身を除く): 28815248

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 52, 56, 83, 91, 104, 112, 166, 167, 182, 208, 332, 334, 364, 581, 664, 668, 728, 1079, 1162, 1169, 1328, 1336, 1456, 2158, 2171, 2324, 2338, 2672, 4316, 4342, 4648, 4676, 7553, 8632, 8684, 9296, 9352, 13861, 15106, 15197, 17264, 17368, 18704, 27722, 30212, 30394, 34736, 55444, 60424, 60788, 97027, 110888, 120848, 121576, 180193, 194054, 221776, 243152, 360386, 388108, 720772, 776216, 1261351, 1441544, 1552432, 2522702, 2883088, 5045404, 10090808, 20181616]

約数ペア:

[(1, 20181616), (2, 10090808), (4, 5045404), (7, 2883088), (8, 2522702), (13, 1552432), (14, 1441544), (16, 1261351), (26, 776216), (28, 720772), (52, 388108), (56, 360386), (83, 243152), (91, 221776), (104, 194054), (112, 180193), (166, 121576), (167, 120848), (182, 110888), (208, 97027), (332, 60788), (334, 60424), (364, 55444), (581, 34736), (664, 30394), (668, 30212), (728, 27722), (1079, 18704), (1162, 17368), (1169, 17264), (1328, 15197), (1336, 15106), (1456, 13861), (2158, 9352), (2171, 9296), (2324, 8684), (2338, 8632), (2672, 7553), (4316, 4676), (4342, 4648)]