18508917

素因数分解:

$3^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{83}}^1$

素因数の和:178

約数の個数: 48

約数和(自身を含む): 30566592

約数和(自身を除く): 12057675

約数列:

[1, 3, 7, 21, 37, 41, 49, 83, 111, 123, 147, 249, 259, 287, 581, 777, 861, 1517, 1743, 1813, 2009, 3071, 3403, 4067, 4551, 5439, 6027, 9213, 10209, 10619, 12201, 21497, 23821, 31857, 64491, 71463, 74333, 125911, 150479, 166747, 222999, 377733, 451437, 500241, 881377, 2644131, 6169639, 18508917]

約数ペア:

[(1, 18508917), (3, 6169639), (7, 2644131), (21, 881377), (37, 500241), (41, 451437), (49, 377733), (83, 222999), (111, 166747), (123, 150479), (147, 125911), (249, 74333), (259, 71463), (287, 64491), (581, 31857), (777, 23821), (861, 21497), (1517, 12201), (1743, 10619), (1813, 10209), (2009, 9213), (3071, 6027), (3403, 5439), (4067, 4551)]