20605815

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{463}}^1$

素因数の和:540

約数の個数: 48

約数和(自身を含む): 38218752

約数和(自身を除く): 17612937

約数列:

[1, 3, 5, 9, 15, 23, 43, 45, 69, 115, 129, 207, 215, 345, 387, 463, 645, 989, 1035, 1389, 1935, 2315, 2967, 4167, 4945, 6945, 8901, 10649, 14835, 19909, 20835, 31947, 44505, 53245, 59727, 95841, 99545, 159735, 179181, 298635, 457907, 479205, 895905, 1373721, 2289535, 4121163, 6868605, 20605815]

約数ペア:

[(1, 20605815), (3, 6868605), (5, 4121163), (9, 2289535), (15, 1373721), (23, 895905), (43, 479205), (45, 457907), (69, 298635), (115, 179181), (129, 159735), (207, 99545), (215, 95841), (345, 59727), (387, 53245), (463, 44505), (645, 31947), (989, 20835), (1035, 19909), (1389, 14835), (1935, 10649), (2315, 8901), (2967, 6945), (4167, 4945)]