18679887

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1$

素因数の和:172

約数の個数: 48

約数和(自身を含む): 30191616

約数和(自身を除く): 11511729

約数列:

[1, 3, 9, 23, 31, 41, 69, 71, 93, 123, 207, 213, 279, 369, 639, 713, 943, 1271, 1633, 2139, 2201, 2829, 2911, 3813, 4899, 6417, 6603, 8487, 8733, 11439, 14697, 19809, 26199, 29233, 50623, 66953, 87699, 90241, 151869, 200859, 263097, 270723, 455607, 602577, 812169, 2075543, 6226629, 18679887]

約数ペア:

[(1, 18679887), (3, 6226629), (9, 2075543), (23, 812169), (31, 602577), (41, 455607), (69, 270723), (71, 263097), (93, 200859), (123, 151869), (207, 90241), (213, 87699), (279, 66953), (369, 50623), (639, 29233), (713, 26199), (943, 19809), (1271, 14697), (1633, 11439), (2139, 8733), (2201, 8487), (2829, 6603), (2911, 6417), (3813, 4899)]