20201181

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^2$

素因数の和:103

約数の個数: 72

約数和(自身を含む): 38035872

約数和(自身を除く): 17834691

約数列:

[1, 3, 7, 11, 13, 21, 31, 33, 39, 49, 77, 91, 93, 143, 147, 217, 231, 273, 341, 403, 429, 539, 637, 651, 961, 1001, 1023, 1209, 1519, 1617, 1911, 2387, 2821, 2883, 3003, 4433, 4557, 6727, 7007, 7161, 8463, 10571, 12493, 13299, 16709, 19747, 20181, 21021, 31031, 31713, 37479, 47089, 50127, 59241, 73997, 87451, 93093, 137423, 141267, 217217, 221991, 262353, 412269, 517979, 612157, 651651, 961961, 1553937, 1836471, 2885883, 6733727, 20201181]

約数ペア:

[(1, 20201181), (3, 6733727), (7, 2885883), (11, 1836471), (13, 1553937), (21, 961961), (31, 651651), (33, 612157), (39, 517979), (49, 412269), (77, 262353), (91, 221991), (93, 217217), (143, 141267), (147, 137423), (217, 93093), (231, 87451), (273, 73997), (341, 59241), (403, 50127), (429, 47089), (539, 37479), (637, 31713), (651, 31031), (961, 21021), (1001, 20181), (1023, 19747), (1209, 16709), (1519, 13299), (1617, 12493), (1911, 10571), (2387, 8463), (2821, 7161), (2883, 7007), (3003, 6727), (4433, 4557)]