21440991

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1$

素因数の和:144

約数の個数: 64

約数和(自身を含む): 36578304

約数和(自身を除く): 15137313

約数列:

[1, 3, 11, 13, 23, 33, 39, 41, 53, 69, 123, 143, 159, 253, 299, 429, 451, 533, 583, 689, 759, 897, 943, 1219, 1353, 1599, 1749, 2067, 2173, 2829, 3289, 3657, 5863, 6519, 7579, 9867, 10373, 12259, 13409, 15847, 17589, 22737, 23903, 28249, 31119, 36777, 40227, 47541, 49979, 71709, 84747, 134849, 149937, 174317, 310739, 404547, 522951, 549769, 649727, 932217, 1649307, 1949181, 7146997, 21440991]

約数ペア:

[(1, 21440991), (3, 7146997), (11, 1949181), (13, 1649307), (23, 932217), (33, 649727), (39, 549769), (41, 522951), (53, 404547), (69, 310739), (123, 174317), (143, 149937), (159, 134849), (253, 84747), (299, 71709), (429, 49979), (451, 47541), (533, 40227), (583, 36777), (689, 31119), (759, 28249), (897, 23903), (943, 22737), (1219, 17589), (1353, 15847), (1599, 13409), (1749, 12259), (2067, 10373), (2173, 9867), (2829, 7579), (3289, 6519), (3657, 5863)]