21260169

素因数分解:

$3^2\times 7^3\times {\mathrm{71}}^1\times {\mathrm{97}}^1$

素因数の和:195

約数の個数: 48

約数和(自身を含む): 36691200

約数和(自身を除く): 15431031

約数列:

[1, 3, 7, 9, 21, 49, 63, 71, 97, 147, 213, 291, 343, 441, 497, 639, 679, 873, 1029, 1491, 2037, 3087, 3479, 4473, 4753, 6111, 6887, 10437, 14259, 20661, 24353, 31311, 33271, 42777, 48209, 61983, 73059, 99813, 144627, 219177, 299439, 337463, 433881, 1012389, 2362241, 3037167, 7086723, 21260169]

約数ペア:

[(1, 21260169), (3, 7086723), (7, 3037167), (9, 2362241), (21, 1012389), (49, 433881), (63, 337463), (71, 299439), (97, 219177), (147, 144627), (213, 99813), (291, 73059), (343, 61983), (441, 48209), (497, 42777), (639, 33271), (679, 31311), (873, 24353), (1029, 20661), (1491, 14259), (2037, 10437), (3087, 6887), (3479, 6111), (4473, 4753)]