28057743

素因数分解:

$3^2\times 7^3\times {\mathrm{61}}^1\times {\mathrm{149}}^1$

素因数の和:237

約数の個数: 48

約数和(自身を含む): 48360000

約数和(自身を除く): 20302257

約数列:

[1, 3, 7, 9, 21, 49, 61, 63, 147, 149, 183, 343, 427, 441, 447, 549, 1029, 1043, 1281, 1341, 2989, 3087, 3129, 3843, 7301, 8967, 9089, 9387, 20923, 21903, 26901, 27267, 51107, 62769, 63623, 65709, 81801, 153321, 188307, 190869, 445361, 459963, 572607, 1336083, 3117527, 4008249, 9352581, 28057743]

約数ペア:

[(1, 28057743), (3, 9352581), (7, 4008249), (9, 3117527), (21, 1336083), (49, 572607), (61, 459963), (63, 445361), (147, 190869), (149, 188307), (183, 153321), (343, 81801), (427, 65709), (441, 63623), (447, 62769), (549, 51107), (1029, 27267), (1043, 26901), (1281, 21903), (1341, 20923), (2989, 9387), (3087, 9089), (3129, 8967), (3843, 7301)]