18191691

素因数分解:

$3^2\times 7^3\times {\mathrm{71}}^1\times {\mathrm{83}}^1$

素因数の和:181

約数の個数: 48

約数和(自身を含む): 31449600

約数和(自身を除く): 13257909

約数列:

[1, 3, 7, 9, 21, 49, 63, 71, 83, 147, 213, 249, 343, 441, 497, 581, 639, 747, 1029, 1491, 1743, 3087, 3479, 4067, 4473, 5229, 5893, 10437, 12201, 17679, 24353, 28469, 31311, 36603, 41251, 53037, 73059, 85407, 123753, 219177, 256221, 288757, 371259, 866271, 2021299, 2598813, 6063897, 18191691]

約数ペア:

[(1, 18191691), (3, 6063897), (7, 2598813), (9, 2021299), (21, 866271), (49, 371259), (63, 288757), (71, 256221), (83, 219177), (147, 123753), (213, 85407), (249, 73059), (343, 53037), (441, 41251), (497, 36603), (581, 31311), (639, 28469), (747, 24353), (1029, 17679), (1491, 12201), (1743, 10437), (3087, 5893), (3479, 5229), (4067, 4473)]