20909427

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{193}}^1$

素因数の和:288

約数の個数: 48

約数和(自身を含む): 36093312

約数和(自身を除く): 15183885

約数列:

[1, 3, 7, 11, 21, 33, 49, 67, 77, 147, 193, 201, 231, 469, 539, 579, 737, 1351, 1407, 1617, 2123, 2211, 3283, 4053, 5159, 6369, 9457, 9849, 12931, 14861, 15477, 28371, 36113, 38793, 44583, 90517, 104027, 108339, 142241, 271551, 312081, 426723, 633619, 995687, 1900857, 2987061, 6969809, 20909427]

約数ペア:

[(1, 20909427), (3, 6969809), (7, 2987061), (11, 1900857), (21, 995687), (33, 633619), (49, 426723), (67, 312081), (77, 271551), (147, 142241), (193, 108339), (201, 104027), (231, 90517), (469, 44583), (539, 38793), (579, 36113), (737, 28371), (1351, 15477), (1407, 14861), (1617, 12931), (2123, 9849), (2211, 9457), (3283, 6369), (4053, 5159)]