21139041

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{769}}^1$

素因数の和:814

約数の個数: 48

約数和(自身を含む): 37920960

約数和(自身を除く): 16781919

約数列:

[1, 3, 7, 11, 17, 21, 33, 49, 51, 77, 119, 147, 187, 231, 357, 539, 561, 769, 833, 1309, 1617, 2307, 2499, 3927, 5383, 8459, 9163, 13073, 16149, 25377, 27489, 37681, 39219, 59213, 91511, 113043, 143803, 177639, 274533, 414491, 431409, 640577, 1006621, 1243473, 1921731, 3019863, 7046347, 21139041]

約数ペア:

[(1, 21139041), (3, 7046347), (7, 3019863), (11, 1921731), (17, 1243473), (21, 1006621), (33, 640577), (49, 431409), (51, 414491), (77, 274533), (119, 177639), (147, 143803), (187, 113043), (231, 91511), (357, 59213), (539, 39219), (561, 37681), (769, 27489), (833, 25377), (1309, 16149), (1617, 13073), (2307, 9163), (2499, 8459), (3927, 5383)]