20723085

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{103}}^1\times {\mathrm{263}}^1$

素因数の和:394

約数の個数: 48

約数和(自身を含む): 38548224

約数和(自身を除く): 17825139

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 103, 153, 255, 263, 309, 515, 765, 789, 927, 1315, 1545, 1751, 2367, 3945, 4471, 4635, 5253, 8755, 11835, 13413, 15759, 22355, 26265, 27089, 40239, 67065, 78795, 81267, 135445, 201195, 243801, 406335, 460513, 1219005, 1381539, 2302565, 4144617, 6907695, 20723085]

約数ペア:

[(1, 20723085), (3, 6907695), (5, 4144617), (9, 2302565), (15, 1381539), (17, 1219005), (45, 460513), (51, 406335), (85, 243801), (103, 201195), (153, 135445), (255, 81267), (263, 78795), (309, 67065), (515, 40239), (765, 27089), (789, 26265), (927, 22355), (1315, 15759), (1545, 13413), (1751, 11835), (2367, 8755), (3945, 5253), (4471, 4635)]