21679119

素因数分解:

$3^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1$

素因数の和:181

約数の個数: 72

約数和(自身を含む): 41081040

約数和(自身を除く): 19401921

約数列:

[1, 3, 7, 9, 11, 21, 33, 41, 49, 63, 77, 99, 109, 123, 147, 231, 287, 327, 369, 441, 451, 539, 693, 763, 861, 981, 1199, 1353, 1617, 2009, 2289, 2583, 3157, 3597, 4059, 4469, 4851, 5341, 6027, 6867, 8393, 9471, 10791, 13407, 16023, 18081, 22099, 25179, 28413, 31283, 40221, 48069, 49159, 58751, 66297, 75537, 93849, 147477, 176253, 198891, 218981, 281547, 344113, 442431, 528759, 656943, 1032339, 1970829, 2408791, 3097017, 7226373, 21679119]

約数ペア:

[(1, 21679119), (3, 7226373), (7, 3097017), (9, 2408791), (11, 1970829), (21, 1032339), (33, 656943), (41, 528759), (49, 442431), (63, 344113), (77, 281547), (99, 218981), (109, 198891), (123, 176253), (147, 147477), (231, 93849), (287, 75537), (327, 66297), (369, 58751), (441, 49159), (451, 48069), (539, 40221), (693, 31283), (763, 28413), (861, 25179), (981, 22099), (1199, 18081), (1353, 16023), (1617, 13407), (2009, 10791), (2289, 9471), (2583, 8393), (3157, 6867), (3597, 6027), (4059, 5341), (4469, 4851)]