20987214

素因数分解:

$2^1\times 3^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{83}}^1$

素因数の和:209

約数の個数: 64

約数和(自身を含む): 46884096

約数和(自身を除く): 25896882

約数列:

[1, 2, 3, 6, 17, 34, 37, 51, 67, 74, 83, 102, 111, 134, 166, 201, 222, 249, 402, 498, 629, 1139, 1258, 1411, 1887, 2278, 2479, 2822, 3071, 3417, 3774, 4233, 4958, 5561, 6142, 6834, 7437, 8466, 9213, 11122, 14874, 16683, 18426, 33366, 42143, 52207, 84286, 94537, 104414, 126429, 156621, 189074, 205757, 252858, 283611, 313242, 411514, 567222, 617271, 1234542, 3497869, 6995738, 10493607, 20987214]

約数ペア:

[(1, 20987214), (2, 10493607), (3, 6995738), (6, 3497869), (17, 1234542), (34, 617271), (37, 567222), (51, 411514), (67, 313242), (74, 283611), (83, 252858), (102, 205757), (111, 189074), (134, 156621), (166, 126429), (201, 104414), (222, 94537), (249, 84286), (402, 52207), (498, 42143), (629, 33366), (1139, 18426), (1258, 16683), (1411, 14874), (1887, 11122), (2278, 9213), (2479, 8466), (2822, 7437), (3071, 6834), (3417, 6142), (3774, 5561), (4233, 4958)]